mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-06-03 05:49:40 +00:00
367 lines
8.9 KiB
Go
367 lines
8.9 KiB
Go
package bun
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import (
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"context"
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"database/sql"
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"fmt"
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"sort"
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"strconv"
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"strings"
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"github.com/uptrace/bun/dialect/feature"
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"github.com/uptrace/bun/dialect/sqltype"
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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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type CreateTableQuery struct {
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baseQuery
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temp bool
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ifNotExists bool
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// varchar changes the default length for VARCHAR columns.
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// Because some dialects require that length is always specified for VARCHAR type,
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// we will use the exact user-defined type if length is set explicitly, as in `bun:",type:varchar(5)"`,
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// but assume the new default length when it's omitted, e.g. `bun:",type:varchar"`.
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varchar int
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fks []schema.QueryWithArgs
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partitionBy schema.QueryWithArgs
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tablespace schema.QueryWithArgs
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}
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var _ Query = (*CreateTableQuery)(nil)
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func NewCreateTableQuery(db *DB) *CreateTableQuery {
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q := &CreateTableQuery{
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baseQuery: baseQuery{
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db: db,
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conn: db.DB,
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},
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varchar: db.Dialect().DefaultVarcharLen(),
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}
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return q
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}
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func (q *CreateTableQuery) Conn(db IConn) *CreateTableQuery {
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q.setConn(db)
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return q
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}
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func (q *CreateTableQuery) Model(model interface{}) *CreateTableQuery {
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q.setModel(model)
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return q
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}
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func (q *CreateTableQuery) Err(err error) *CreateTableQuery {
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q.setErr(err)
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return q
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}
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// ------------------------------------------------------------------------------
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func (q *CreateTableQuery) Table(tables ...string) *CreateTableQuery {
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for _, table := range tables {
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q.addTable(schema.UnsafeIdent(table))
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}
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return q
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}
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func (q *CreateTableQuery) TableExpr(query string, args ...interface{}) *CreateTableQuery {
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q.addTable(schema.SafeQuery(query, args))
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return q
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}
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func (q *CreateTableQuery) ModelTableExpr(query string, args ...interface{}) *CreateTableQuery {
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q.modelTableName = schema.SafeQuery(query, args)
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return q
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}
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func (q *CreateTableQuery) ColumnExpr(query string, args ...interface{}) *CreateTableQuery {
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q.addColumn(schema.SafeQuery(query, args))
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return q
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}
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// ------------------------------------------------------------------------------
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func (q *CreateTableQuery) Temp() *CreateTableQuery {
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q.temp = true
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return q
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}
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func (q *CreateTableQuery) IfNotExists() *CreateTableQuery {
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q.ifNotExists = true
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return q
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}
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// Varchar sets default length for VARCHAR columns.
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func (q *CreateTableQuery) Varchar(n int) *CreateTableQuery {
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if n <= 0 {
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q.setErr(fmt.Errorf("bun: illegal VARCHAR length: %d", n))
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return q
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}
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q.varchar = n
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return q
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}
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func (q *CreateTableQuery) ForeignKey(query string, args ...interface{}) *CreateTableQuery {
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q.fks = append(q.fks, schema.SafeQuery(query, args))
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return q
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}
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func (q *CreateTableQuery) PartitionBy(query string, args ...interface{}) *CreateTableQuery {
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q.partitionBy = schema.SafeQuery(query, args)
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return q
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}
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func (q *CreateTableQuery) TableSpace(tablespace string) *CreateTableQuery {
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q.tablespace = schema.UnsafeIdent(tablespace)
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return q
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}
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func (q *CreateTableQuery) WithForeignKeys() *CreateTableQuery {
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for _, relation := range q.tableModel.Table().Relations {
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if relation.Type == schema.ManyToManyRelation ||
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relation.Type == schema.HasManyRelation {
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continue
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}
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q = q.ForeignKey("(?) REFERENCES ? (?) ? ?",
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Safe(appendColumns(nil, "", relation.BaseFields)),
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relation.JoinTable.SQLName,
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Safe(appendColumns(nil, "", relation.JoinFields)),
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Safe(relation.OnUpdate),
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Safe(relation.OnDelete),
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)
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}
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return q
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}
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// ------------------------------------------------------------------------------
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func (q *CreateTableQuery) Operation() string {
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return "CREATE TABLE"
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}
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func (q *CreateTableQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
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if q.err != nil {
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return nil, q.err
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}
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if q.table == nil {
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return nil, errNilModel
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}
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b = append(b, "CREATE "...)
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if q.temp {
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b = append(b, "TEMP "...)
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}
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b = append(b, "TABLE "...)
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if q.ifNotExists && fmter.Dialect().Features().Has(feature.TableNotExists) {
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b = append(b, "IF NOT EXISTS "...)
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}
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b, err = q.appendFirstTable(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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for i, field := range q.table.Fields {
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if i > 0 {
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b = append(b, ", "...)
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}
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b = append(b, field.SQLName...)
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b = append(b, " "...)
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b = q.appendSQLType(b, field)
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if field.NotNull {
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b = append(b, " NOT NULL"...)
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}
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if field.AutoIncrement {
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switch {
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case fmter.Dialect().Features().Has(feature.AutoIncrement):
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b = append(b, " AUTO_INCREMENT"...)
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case fmter.Dialect().Features().Has(feature.Identity):
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b = append(b, " IDENTITY"...)
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}
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}
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if field.Identity {
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if fmter.Dialect().Features().Has(feature.GeneratedIdentity) {
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b = append(b, " GENERATED BY DEFAULT AS IDENTITY"...)
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}
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}
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if field.SQLDefault != "" {
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b = append(b, " DEFAULT "...)
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b = append(b, field.SQLDefault...)
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}
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}
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for i, col := range q.columns {
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// Only pre-pend the comma if we are on subsequent iterations, or if there were fields/columns appended before
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// this. This way if we are only appending custom column expressions we will not produce a syntax error with a
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// leading comma.
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if i > 0 || len(q.table.Fields) > 0 {
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b = append(b, ", "...)
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}
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b, err = col.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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b = q.appendPKConstraint(b, q.table.PKs)
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b = q.appendUniqueConstraints(fmter, b)
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b, err = q.appendFKConstraints(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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if !q.partitionBy.IsZero() {
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b = append(b, " PARTITION BY "...)
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b, err = q.partitionBy.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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if !q.tablespace.IsZero() {
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b = append(b, " TABLESPACE "...)
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b, err = q.tablespace.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 *CreateTableQuery) appendSQLType(b []byte, field *schema.Field) []byte {
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// Most of the time these two will match, but for the cases where DiscoveredSQLType is dialect-specific,
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// e.g. pgdialect would change sqltype.SmallInt to pgTypeSmallSerial for columns that have `bun:",autoincrement"`
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if !strings.EqualFold(field.CreateTableSQLType, field.DiscoveredSQLType) {
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return append(b, field.CreateTableSQLType...)
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}
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// For all common SQL types except VARCHAR, both UserDefinedSQLType and DiscoveredSQLType specify the correct type,
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// and we needn't modify it. For VARCHAR columns, we will stop to check if a valid length has been set in .Varchar(int).
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if !strings.EqualFold(field.CreateTableSQLType, sqltype.VarChar) || q.varchar <= 0 {
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return append(b, field.CreateTableSQLType...)
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}
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b = append(b, sqltype.VarChar...)
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b = append(b, "("...)
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b = strconv.AppendInt(b, int64(q.varchar), 10)
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b = append(b, ")"...)
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return b
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}
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func (q *CreateTableQuery) appendUniqueConstraints(fmter schema.Formatter, b []byte) []byte {
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unique := q.table.Unique
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keys := make([]string, 0, len(unique))
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for key := range unique {
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keys = append(keys, key)
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}
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sort.Strings(keys)
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for _, key := range keys {
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if key == "" {
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for _, field := range unique[key] {
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b = q.appendUniqueConstraint(fmter, b, key, field)
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}
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continue
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}
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b = q.appendUniqueConstraint(fmter, b, key, unique[key]...)
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}
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return b
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}
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func (q *CreateTableQuery) appendUniqueConstraint(
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fmter schema.Formatter, b []byte, name string, fields ...*schema.Field,
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) []byte {
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if name != "" {
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b = append(b, ", CONSTRAINT "...)
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b = fmter.AppendIdent(b, name)
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} else {
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b = append(b, ","...)
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}
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b = append(b, " UNIQUE ("...)
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b = appendColumns(b, "", fields)
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b = append(b, ")"...)
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return b
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}
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func (q *CreateTableQuery) appendFKConstraints(
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fmter schema.Formatter, b []byte,
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) (_ []byte, err error) {
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for _, fk := range q.fks {
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b = append(b, ", FOREIGN KEY "...)
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b, err = fk.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 *CreateTableQuery) appendPKConstraint(b []byte, pks []*schema.Field) []byte {
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if len(pks) == 0 {
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return b
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}
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b = append(b, ", PRIMARY KEY ("...)
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b = appendColumns(b, "", pks)
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b = append(b, ")"...)
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return b
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}
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// ------------------------------------------------------------------------------
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func (q *CreateTableQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
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if err := q.beforeCreateTableHook(ctx); err != nil {
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return nil, err
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}
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queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
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if err != nil {
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return nil, err
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}
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query := internal.String(queryBytes)
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res, err := q.exec(ctx, q, query)
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if err != nil {
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return nil, err
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}
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if q.table != nil {
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if err := q.afterCreateTableHook(ctx); err != nil {
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return nil, err
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}
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}
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return res, nil
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}
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func (q *CreateTableQuery) beforeCreateTableHook(ctx context.Context) error {
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if hook, ok := q.table.ZeroIface.(BeforeCreateTableHook); ok {
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if err := hook.BeforeCreateTable(ctx, q); err != nil {
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return err
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}
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}
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return nil
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}
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func (q *CreateTableQuery) afterCreateTableHook(ctx context.Context) error {
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if hook, ok := q.table.ZeroIface.(AfterCreateTableHook); ok {
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if err := hook.AfterCreateTable(ctx, q); err != nil {
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return err
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}
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}
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return nil
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}
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