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