Method DropConstraint

migrator/migrator.go:778–786

DropConstraint drop constraint

(value interface{}, name string)

// DropConstraint drop constraint
func (m Migrator) DropConstraint(value interface{}, name string) error {
	return m.RunWithValue(value, func(stmt *gorm.Statement) error {
		constraint, table := m.GuessConstraintInterfaceAndTable(stmt, name)
		if constraint != nil {
			name = constraint.GetName()
		}
		return m.DB.Exec("ALTER TABLE ? DROP CONSTRAINT ?", clause.Table{Name: table}, clause.Column{Name: name}).Error
	})
}

// HasConstraint check has constraint or not
func (m Migrator) HasConstraint(value interface{}, name string) bool {