forked from mirrors/gotosocial
870 lines
18 KiB
Go
870 lines
18 KiB
Go
package bun
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import (
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"context"
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"database/sql"
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"database/sql/driver"
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"errors"
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"fmt"
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"github.com/uptrace/bun/dialect/feature"
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"github.com/uptrace/bun/internal"
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"github.com/uptrace/bun/schema"
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)
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const (
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wherePKFlag internal.Flag = 1 << iota
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forceDeleteFlag
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deletedFlag
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allWithDeletedFlag
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)
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type withQuery struct {
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name string
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query schema.QueryAppender
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}
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// IConn is a common interface for *sql.DB, *sql.Conn, and *sql.Tx.
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type IConn interface {
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QueryContext(ctx context.Context, query string, args ...interface{}) (*sql.Rows, error)
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ExecContext(ctx context.Context, query string, args ...interface{}) (sql.Result, error)
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QueryRowContext(ctx context.Context, query string, args ...interface{}) *sql.Row
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}
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var (
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_ IConn = (*sql.DB)(nil)
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_ IConn = (*sql.Conn)(nil)
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_ IConn = (*sql.Tx)(nil)
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_ IConn = (*DB)(nil)
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_ IConn = (*Conn)(nil)
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_ IConn = (*Tx)(nil)
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)
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// IDB is a common interface for *bun.DB, bun.Conn, and bun.Tx.
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type IDB interface {
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IConn
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NewValues(model interface{}) *ValuesQuery
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NewSelect() *SelectQuery
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NewInsert() *InsertQuery
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NewUpdate() *UpdateQuery
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NewDelete() *DeleteQuery
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NewCreateTable() *CreateTableQuery
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NewDropTable() *DropTableQuery
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NewCreateIndex() *CreateIndexQuery
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NewDropIndex() *DropIndexQuery
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NewTruncateTable() *TruncateTableQuery
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NewAddColumn() *AddColumnQuery
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NewDropColumn() *DropColumnQuery
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}
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var (
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_ IConn = (*DB)(nil)
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_ IConn = (*Conn)(nil)
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_ IConn = (*Tx)(nil)
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)
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type baseQuery struct {
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db *DB
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conn IConn
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model model
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err error
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tableModel tableModel
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table *schema.Table
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with []withQuery
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modelTable schema.QueryWithArgs
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tables []schema.QueryWithArgs
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columns []schema.QueryWithArgs
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flags internal.Flag
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}
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func (q *baseQuery) DB() *DB {
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return q.db
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}
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func (q *baseQuery) GetModel() Model {
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return q.model
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}
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func (q *baseQuery) setConn(db IConn) {
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// Unwrap Bun wrappers to not call query hooks twice.
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switch db := db.(type) {
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case *DB:
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q.conn = db.DB
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case Conn:
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q.conn = db.Conn
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case Tx:
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q.conn = db.Tx
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default:
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q.conn = db
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}
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}
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// TODO: rename to setModel
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func (q *baseQuery) setTableModel(modeli interface{}) {
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model, err := newSingleModel(q.db, modeli)
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if err != nil {
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q.setErr(err)
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return
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}
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q.model = model
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if tm, ok := model.(tableModel); ok {
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q.tableModel = tm
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q.table = tm.Table()
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}
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}
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func (q *baseQuery) setErr(err error) {
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if q.err == nil {
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q.err = err
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}
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}
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func (q *baseQuery) getModel(dest []interface{}) (model, error) {
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if len(dest) == 0 {
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if q.model != nil {
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return q.model, nil
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}
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return nil, errNilModel
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}
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return newModel(q.db, dest)
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) checkSoftDelete() error {
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if q.table == nil {
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return errors.New("bun: can't use soft deletes without a table")
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}
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if q.table.SoftDeleteField == nil {
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return fmt.Errorf("%s does not have a soft delete field", q.table)
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}
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if q.tableModel == nil {
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return errors.New("bun: can't use soft deletes without a table model")
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}
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return nil
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}
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// Deleted adds `WHERE deleted_at IS NOT NULL` clause for soft deleted models.
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func (q *baseQuery) whereDeleted() {
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if err := q.checkSoftDelete(); err != nil {
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q.setErr(err)
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return
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}
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q.flags = q.flags.Set(deletedFlag)
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q.flags = q.flags.Remove(allWithDeletedFlag)
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}
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// AllWithDeleted changes query to return all rows including soft deleted ones.
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func (q *baseQuery) whereAllWithDeleted() {
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if err := q.checkSoftDelete(); err != nil {
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q.setErr(err)
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return
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}
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q.flags = q.flags.Set(allWithDeletedFlag)
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q.flags = q.flags.Remove(deletedFlag)
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}
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func (q *baseQuery) isSoftDelete() bool {
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if q.table != nil {
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return q.table.SoftDeleteField != nil && !q.flags.Has(allWithDeletedFlag)
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}
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return false
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) addWith(name string, query schema.QueryAppender) {
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q.with = append(q.with, withQuery{
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name: name,
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query: query,
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})
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}
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func (q *baseQuery) appendWith(fmter schema.Formatter, b []byte) (_ []byte, err error) {
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if len(q.with) == 0 {
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return b, nil
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}
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b = append(b, "WITH "...)
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for i, with := range q.with {
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if i > 0 {
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b = append(b, ", "...)
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}
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b = fmter.AppendIdent(b, with.name)
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if q, ok := with.query.(schema.ColumnsAppender); ok {
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b = append(b, " ("...)
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b, err = q.AppendColumns(fmter, b)
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if err != nil {
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return nil, err
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}
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b = append(b, ")"...)
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}
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b = append(b, " AS ("...)
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b, err = with.query.AppendQuery(fmter, b)
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if err != nil {
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return nil, err
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}
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b = append(b, ')')
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}
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b = append(b, ' ')
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return b, nil
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) addTable(table schema.QueryWithArgs) {
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q.tables = append(q.tables, table)
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}
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func (q *baseQuery) addColumn(column schema.QueryWithArgs) {
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q.columns = append(q.columns, column)
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}
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func (q *baseQuery) excludeColumn(columns []string) {
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if q.columns == nil {
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for _, f := range q.table.Fields {
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q.columns = append(q.columns, schema.UnsafeIdent(f.Name))
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}
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}
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if len(columns) == 1 && columns[0] == "*" {
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q.columns = make([]schema.QueryWithArgs, 0)
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return
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}
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for _, column := range columns {
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if !q._excludeColumn(column) {
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q.setErr(fmt.Errorf("bun: can't find column=%q", column))
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return
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}
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}
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}
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func (q *baseQuery) _excludeColumn(column string) bool {
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for i, col := range q.columns {
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if col.Args == nil && col.Query == column {
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q.columns = append(q.columns[:i], q.columns[i+1:]...)
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return true
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}
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}
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return false
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) modelHasTableName() bool {
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if !q.modelTable.IsZero() {
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return q.modelTable.Query != ""
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}
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return q.table != nil
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}
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func (q *baseQuery) hasTables() bool {
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return q.modelHasTableName() || len(q.tables) > 0
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}
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func (q *baseQuery) appendTables(
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fmter schema.Formatter, b []byte,
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) (_ []byte, err error) {
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return q._appendTables(fmter, b, false)
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}
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func (q *baseQuery) appendTablesWithAlias(
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fmter schema.Formatter, b []byte,
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) (_ []byte, err error) {
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return q._appendTables(fmter, b, true)
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}
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func (q *baseQuery) _appendTables(
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fmter schema.Formatter, b []byte, withAlias bool,
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) (_ []byte, err error) {
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startLen := len(b)
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if q.modelHasTableName() {
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if !q.modelTable.IsZero() {
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b, err = q.modelTable.AppendQuery(fmter, b)
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if err != nil {
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return nil, err
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}
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} else {
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b = fmter.AppendQuery(b, string(q.table.SQLNameForSelects))
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if withAlias && q.table.SQLAlias != q.table.SQLNameForSelects {
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b = append(b, " AS "...)
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b = append(b, q.table.SQLAlias...)
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}
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}
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}
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for _, table := range q.tables {
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if len(b) > startLen {
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b = append(b, ", "...)
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}
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b, err = table.AppendQuery(fmter, b)
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if err != nil {
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return nil, err
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}
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}
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return b, nil
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}
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func (q *baseQuery) appendFirstTable(fmter schema.Formatter, b []byte) ([]byte, error) {
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return q._appendFirstTable(fmter, b, false)
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}
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func (q *baseQuery) appendFirstTableWithAlias(
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fmter schema.Formatter, b []byte,
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) ([]byte, error) {
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return q._appendFirstTable(fmter, b, true)
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}
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func (q *baseQuery) _appendFirstTable(
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fmter schema.Formatter, b []byte, withAlias bool,
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) ([]byte, error) {
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if !q.modelTable.IsZero() {
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return q.modelTable.AppendQuery(fmter, b)
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}
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if q.table != nil {
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b = fmter.AppendQuery(b, string(q.table.SQLName))
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if withAlias {
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b = append(b, " AS "...)
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b = append(b, q.table.SQLAlias...)
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}
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return b, nil
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}
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if len(q.tables) > 0 {
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return q.tables[0].AppendQuery(fmter, b)
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}
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return nil, errors.New("bun: query does not have a table")
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}
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func (q *baseQuery) hasMultiTables() bool {
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if q.modelHasTableName() {
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return len(q.tables) >= 1
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}
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return len(q.tables) >= 2
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}
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func (q *baseQuery) appendOtherTables(fmter schema.Formatter, b []byte) (_ []byte, err error) {
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tables := q.tables
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if !q.modelHasTableName() {
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tables = tables[1:]
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}
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for i, table := range tables {
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if i > 0 {
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b = append(b, ", "...)
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}
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b, err = table.AppendQuery(fmter, b)
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if err != nil {
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return nil, err
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}
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}
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return b, nil
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) appendColumns(fmter schema.Formatter, b []byte) (_ []byte, err error) {
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for i, f := range q.columns {
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if i > 0 {
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b = append(b, ", "...)
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}
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b, err = f.AppendQuery(fmter, b)
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if err != nil {
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return nil, err
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}
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}
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return b, nil
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}
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func (q *baseQuery) getFields() ([]*schema.Field, error) {
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if len(q.columns) == 0 {
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return q.table.Fields, nil
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}
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return q._getFields(false)
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}
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func (q *baseQuery) getDataFields() ([]*schema.Field, error) {
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if len(q.columns) == 0 {
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return q.table.DataFields, nil
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}
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return q._getFields(true)
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}
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func (q *baseQuery) _getFields(omitPK bool) ([]*schema.Field, error) {
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fields := make([]*schema.Field, 0, len(q.columns))
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for _, col := range q.columns {
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if col.Args != nil {
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continue
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}
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field, err := q.table.Field(col.Query)
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if err != nil {
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return nil, err
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}
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if omitPK && field.IsPK {
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continue
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}
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fields = append(fields, field)
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}
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return fields, nil
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}
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func (q *baseQuery) scan(
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ctx context.Context,
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queryApp schema.Query,
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query string,
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model model,
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hasDest bool,
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) (sql.Result, error) {
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ctx, event := q.db.beforeQuery(ctx, queryApp, query, nil)
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rows, err := q.conn.QueryContext(ctx, query)
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if err != nil {
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q.db.afterQuery(ctx, event, nil, err)
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return nil, err
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}
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defer rows.Close()
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numRow, err := model.ScanRows(ctx, rows)
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if err != nil {
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q.db.afterQuery(ctx, event, nil, err)
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return nil, err
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}
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if numRow == 0 && hasDest && isSingleRowModel(model) {
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err = sql.ErrNoRows
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}
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res := driver.RowsAffected(numRow)
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q.db.afterQuery(ctx, event, res, err)
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return res, err
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}
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func (q *baseQuery) exec(
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ctx context.Context,
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queryApp schema.Query,
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query string,
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) (sql.Result, error) {
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ctx, event := q.db.beforeQuery(ctx, queryApp, query, nil)
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res, err := q.conn.ExecContext(ctx, query)
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if err != nil {
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q.db.afterQuery(ctx, event, nil, err)
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return res, err
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}
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q.db.afterQuery(ctx, event, res, err)
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return res, nil
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}
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//------------------------------------------------------------------------------
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func (q *baseQuery) AppendNamedArg(fmter schema.Formatter, b []byte, name string) ([]byte, bool) {
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if q.table == nil {
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return b, false
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}
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if m, ok := q.tableModel.(*structTableModel); ok {
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if b, ok := m.AppendNamedArg(fmter, b, name); ok {
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return b, ok
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}
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}
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switch name {
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case "TableName":
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b = fmter.AppendQuery(b, string(q.table.SQLName))
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return b, true
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case "TableAlias":
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b = fmter.AppendQuery(b, string(q.table.SQLAlias))
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return b, true
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case "PKs":
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b = appendColumns(b, "", q.table.PKs)
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return b, true
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case "TablePKs":
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b = appendColumns(b, q.table.SQLAlias, q.table.PKs)
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return b, true
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case "Columns":
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b = appendColumns(b, "", q.table.Fields)
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return b, true
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case "TableColumns":
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b = appendColumns(b, q.table.SQLAlias, q.table.Fields)
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return b, true
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}
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return b, false
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}
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func appendColumns(b []byte, table schema.Safe, fields []*schema.Field) []byte {
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for i, f := range fields {
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if i > 0 {
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b = append(b, ", "...)
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}
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if len(table) > 0 {
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b = append(b, table...)
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b = append(b, '.')
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}
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b = append(b, f.SQLName...)
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}
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return b
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}
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func formatterWithModel(fmter schema.Formatter, model schema.NamedArgAppender) schema.Formatter {
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if fmter.IsNop() {
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return fmter
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}
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return fmter.WithArg(model)
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}
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//------------------------------------------------------------------------------
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type whereBaseQuery struct {
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baseQuery
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where []schema.QueryWithSep
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}
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func (q *whereBaseQuery) addWhere(where schema.QueryWithSep) {
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q.where = append(q.where, where)
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}
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func (q *whereBaseQuery) addWhereGroup(sep string, where []schema.QueryWithSep) {
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if len(where) == 0 {
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return
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}
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q.addWhere(schema.SafeQueryWithSep("", nil, sep))
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q.addWhere(schema.SafeQueryWithSep("", nil, "("))
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where[0].Sep = ""
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q.where = append(q.where, where...)
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q.addWhere(schema.SafeQueryWithSep("", nil, ")"))
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}
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func (q *whereBaseQuery) mustAppendWhere(
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fmter schema.Formatter, b []byte, withAlias bool,
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) ([]byte, error) {
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if len(q.where) == 0 && !q.flags.Has(wherePKFlag) {
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err := errors.New("bun: Update and Delete queries require at least one Where")
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return nil, err
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}
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return q.appendWhere(fmter, b, withAlias)
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}
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func (q *whereBaseQuery) appendWhere(
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fmter schema.Formatter, b []byte, withAlias bool,
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) (_ []byte, err error) {
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if len(q.where) == 0 && !q.isSoftDelete() && !q.flags.Has(wherePKFlag) {
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return b, nil
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}
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b = append(b, " WHERE "...)
|
|
startLen := len(b)
|
|
|
|
if len(q.where) > 0 {
|
|
b, err = appendWhere(fmter, b, q.where)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if q.isSoftDelete() {
|
|
if len(b) > startLen {
|
|
b = append(b, " AND "...)
|
|
}
|
|
if withAlias {
|
|
b = append(b, q.tableModel.Table().SQLAlias...)
|
|
b = append(b, '.')
|
|
}
|
|
b = append(b, q.tableModel.Table().SoftDeleteField.SQLName...)
|
|
if q.flags.Has(deletedFlag) {
|
|
b = append(b, " IS NOT NULL"...)
|
|
} else {
|
|
b = append(b, " IS NULL"...)
|
|
}
|
|
}
|
|
|
|
if q.flags.Has(wherePKFlag) {
|
|
if len(b) > startLen {
|
|
b = append(b, " AND "...)
|
|
}
|
|
b, err = q.appendWherePK(fmter, b, withAlias)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
return b, nil
|
|
}
|
|
|
|
func appendWhere(
|
|
fmter schema.Formatter, b []byte, where []schema.QueryWithSep,
|
|
) (_ []byte, err error) {
|
|
for i, where := range where {
|
|
if i > 0 {
|
|
b = append(b, where.Sep...)
|
|
}
|
|
|
|
if where.Query == "" {
|
|
continue
|
|
}
|
|
|
|
b = append(b, '(')
|
|
b, err = where.AppendQuery(fmter, b)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
b = append(b, ')')
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
func (q *whereBaseQuery) appendWherePK(
|
|
fmter schema.Formatter, b []byte, withAlias bool,
|
|
) (_ []byte, err error) {
|
|
if q.table == nil {
|
|
err := fmt.Errorf("bun: got %T, but WherePK requires a struct or slice-based model", q.model)
|
|
return nil, err
|
|
}
|
|
if err := q.table.CheckPKs(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
switch model := q.tableModel.(type) {
|
|
case *structTableModel:
|
|
return q.appendWherePKStruct(fmter, b, model, withAlias)
|
|
case *sliceTableModel:
|
|
return q.appendWherePKSlice(fmter, b, model, withAlias)
|
|
}
|
|
|
|
return nil, fmt.Errorf("bun: WherePK does not support %T", q.tableModel)
|
|
}
|
|
|
|
func (q *whereBaseQuery) appendWherePKStruct(
|
|
fmter schema.Formatter, b []byte, model *structTableModel, withAlias bool,
|
|
) (_ []byte, err error) {
|
|
if !model.strct.IsValid() {
|
|
return nil, errNilModel
|
|
}
|
|
|
|
isTemplate := fmter.IsNop()
|
|
b = append(b, '(')
|
|
for i, f := range q.table.PKs {
|
|
if i > 0 {
|
|
b = append(b, " AND "...)
|
|
}
|
|
if withAlias {
|
|
b = append(b, q.table.SQLAlias...)
|
|
b = append(b, '.')
|
|
}
|
|
b = append(b, f.SQLName...)
|
|
b = append(b, " = "...)
|
|
if isTemplate {
|
|
b = append(b, '?')
|
|
} else {
|
|
b = f.AppendValue(fmter, b, model.strct)
|
|
}
|
|
}
|
|
b = append(b, ')')
|
|
return b, nil
|
|
}
|
|
|
|
func (q *whereBaseQuery) appendWherePKSlice(
|
|
fmter schema.Formatter, b []byte, model *sliceTableModel, withAlias bool,
|
|
) (_ []byte, err error) {
|
|
if len(q.table.PKs) > 1 {
|
|
b = append(b, '(')
|
|
}
|
|
if withAlias {
|
|
b = appendColumns(b, q.table.SQLAlias, q.table.PKs)
|
|
} else {
|
|
b = appendColumns(b, "", q.table.PKs)
|
|
}
|
|
if len(q.table.PKs) > 1 {
|
|
b = append(b, ')')
|
|
}
|
|
|
|
b = append(b, " IN ("...)
|
|
|
|
isTemplate := fmter.IsNop()
|
|
slice := model.slice
|
|
sliceLen := slice.Len()
|
|
for i := 0; i < sliceLen; i++ {
|
|
if i > 0 {
|
|
if isTemplate {
|
|
break
|
|
}
|
|
b = append(b, ", "...)
|
|
}
|
|
|
|
el := indirect(slice.Index(i))
|
|
|
|
if len(q.table.PKs) > 1 {
|
|
b = append(b, '(')
|
|
}
|
|
for i, f := range q.table.PKs {
|
|
if i > 0 {
|
|
b = append(b, ", "...)
|
|
}
|
|
if isTemplate {
|
|
b = append(b, '?')
|
|
} else {
|
|
b = f.AppendValue(fmter, b, el)
|
|
}
|
|
}
|
|
if len(q.table.PKs) > 1 {
|
|
b = append(b, ')')
|
|
}
|
|
}
|
|
|
|
b = append(b, ')')
|
|
|
|
return b, nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type returningQuery struct {
|
|
returning []schema.QueryWithArgs
|
|
returningFields []*schema.Field
|
|
}
|
|
|
|
func (q *returningQuery) addReturning(ret schema.QueryWithArgs) {
|
|
q.returning = append(q.returning, ret)
|
|
}
|
|
|
|
func (q *returningQuery) addReturningField(field *schema.Field) {
|
|
if len(q.returning) > 0 {
|
|
return
|
|
}
|
|
for _, f := range q.returningFields {
|
|
if f == field {
|
|
return
|
|
}
|
|
}
|
|
q.returningFields = append(q.returningFields, field)
|
|
}
|
|
|
|
func (q *returningQuery) hasReturning() bool {
|
|
if len(q.returning) == 1 {
|
|
switch q.returning[0].Query {
|
|
case "null", "NULL":
|
|
return false
|
|
}
|
|
}
|
|
return len(q.returning) > 0 || len(q.returningFields) > 0
|
|
}
|
|
|
|
func (q *returningQuery) appendReturning(
|
|
fmter schema.Formatter, b []byte,
|
|
) (_ []byte, err error) {
|
|
if !q.hasReturning() {
|
|
return b, nil
|
|
}
|
|
|
|
b = append(b, " RETURNING "...)
|
|
|
|
for i, f := range q.returning {
|
|
if i > 0 {
|
|
b = append(b, ", "...)
|
|
}
|
|
b, err = f.AppendQuery(fmter, b)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
|
|
if len(q.returning) > 0 {
|
|
return b, nil
|
|
}
|
|
|
|
b = appendColumns(b, "", q.returningFields)
|
|
return b, nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type columnValue struct {
|
|
column string
|
|
value schema.QueryWithArgs
|
|
}
|
|
|
|
type customValueQuery struct {
|
|
modelValues map[string]schema.QueryWithArgs
|
|
extraValues []columnValue
|
|
}
|
|
|
|
func (q *customValueQuery) addValue(
|
|
table *schema.Table, column string, value string, args []interface{},
|
|
) {
|
|
if _, ok := table.FieldMap[column]; ok {
|
|
if q.modelValues == nil {
|
|
q.modelValues = make(map[string]schema.QueryWithArgs)
|
|
}
|
|
q.modelValues[column] = schema.SafeQuery(value, args)
|
|
} else {
|
|
q.extraValues = append(q.extraValues, columnValue{
|
|
column: column,
|
|
value: schema.SafeQuery(value, args),
|
|
})
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type setQuery struct {
|
|
set []schema.QueryWithArgs
|
|
}
|
|
|
|
func (q *setQuery) addSet(set schema.QueryWithArgs) {
|
|
q.set = append(q.set, set)
|
|
}
|
|
|
|
func (q setQuery) appendSet(fmter schema.Formatter, b []byte) (_ []byte, err error) {
|
|
for i, f := range q.set {
|
|
if i > 0 {
|
|
b = append(b, ", "...)
|
|
}
|
|
b, err = f.AppendQuery(fmter, b)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
|
|
type cascadeQuery struct {
|
|
restrict bool
|
|
}
|
|
|
|
func (q cascadeQuery) appendCascade(fmter schema.Formatter, b []byte) []byte {
|
|
if !fmter.HasFeature(feature.TableCascade) {
|
|
return b
|
|
}
|
|
if q.restrict {
|
|
b = append(b, " RESTRICT"...)
|
|
} else {
|
|
b = append(b, " CASCADE"...)
|
|
}
|
|
return b
|
|
}
|