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delete.go
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delete.go
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package orm
import "github.com/go-pg/pg/internal"
func Delete(db DB, model interface{}) error {
res, err := NewQuery(db, model).Delete()
if err != nil {
return err
}
return internal.AssertOneRow(res.RowsAffected())
}
type deleteQuery struct {
q *Query
}
var _ QueryAppender = (*deleteQuery)(nil)
func (q deleteQuery) Copy() QueryAppender {
return deleteQuery{
q: q.q.Copy(),
}
}
func (q deleteQuery) Query() *Query {
return q.q
}
func (q deleteQuery) AppendQuery(b []byte) ([]byte, error) {
if q.q.stickyErr != nil {
return nil, q.q.stickyErr
}
var err error
if len(q.q.with) > 0 {
b, err = q.q.appendWith(b, "")
if err != nil {
return nil, err
}
}
b = append(b, "DELETE FROM "...)
b = q.q.appendFirstTable(b)
if q.q.hasOtherTables() {
b = append(b, " USING "...)
b = q.q.appendOtherTables(b)
}
b, err = q.q.mustAppendWhere(b)
if err != nil {
return nil, err
}
if len(q.q.returning) > 0 {
b = q.q.appendReturning(b)
}
return b, nil
}