gotosocial/vendor/github.com/uptrace/bun/query_table_drop.go
2023-01-22 12:26:47 +01:00

153 lines
3 KiB
Go

package bun
import (
"context"
"database/sql"
"github.com/uptrace/bun/internal"
"github.com/uptrace/bun/schema"
)
type DropTableQuery struct {
baseQuery
cascadeQuery
ifExists bool
}
var _ Query = (*DropTableQuery)(nil)
func NewDropTableQuery(db *DB) *DropTableQuery {
q := &DropTableQuery{
baseQuery: baseQuery{
db: db,
conn: db.DB,
},
}
return q
}
func (q *DropTableQuery) Conn(db IConn) *DropTableQuery {
q.setConn(db)
return q
}
func (q *DropTableQuery) Model(model interface{}) *DropTableQuery {
q.setModel(model)
return q
}
func (q *DropTableQuery) Err(err error) *DropTableQuery {
q.setErr(err)
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Table(tables ...string) *DropTableQuery {
for _, table := range tables {
q.addTable(schema.UnsafeIdent(table))
}
return q
}
func (q *DropTableQuery) TableExpr(query string, args ...interface{}) *DropTableQuery {
q.addTable(schema.SafeQuery(query, args))
return q
}
func (q *DropTableQuery) ModelTableExpr(query string, args ...interface{}) *DropTableQuery {
q.modelTableName = schema.SafeQuery(query, args)
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) IfExists() *DropTableQuery {
q.ifExists = true
return q
}
func (q *DropTableQuery) Cascade() *DropTableQuery {
q.cascade = true
return q
}
func (q *DropTableQuery) Restrict() *DropTableQuery {
q.restrict = true
return q
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Operation() string {
return "DROP TABLE"
}
func (q *DropTableQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
if q.err != nil {
return nil, q.err
}
b = append(b, "DROP TABLE "...)
if q.ifExists {
b = append(b, "IF EXISTS "...)
}
b, err = q.appendTables(fmter, b)
if err != nil {
return nil, err
}
b = q.appendCascade(fmter, b)
return b, nil
}
//------------------------------------------------------------------------------
func (q *DropTableQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
if q.table != nil {
if err := q.beforeDropTableHook(ctx); err != nil {
return nil, err
}
}
queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
if err != nil {
return nil, err
}
query := internal.String(queryBytes)
res, err := q.exec(ctx, q, query)
if err != nil {
return nil, err
}
if q.table != nil {
if err := q.afterDropTableHook(ctx); err != nil {
return nil, err
}
}
return res, nil
}
func (q *DropTableQuery) beforeDropTableHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(BeforeDropTableHook); ok {
if err := hook.BeforeDropTable(ctx, q); err != nil {
return err
}
}
return nil
}
func (q *DropTableQuery) afterDropTableHook(ctx context.Context) error {
if hook, ok := q.table.ZeroIface.(AfterDropTableHook); ok {
if err := hook.AfterDropTable(ctx, q); err != nil {
return err
}
}
return nil
}