// not trigger alert column
	AssertEqual(t, true, DB.Migrator().HasConstraint(&UniqueTest{}, "uni_unique_tests_name"))
	AssertEqual(t, false, DB.Migrator().HasIndex(&UniqueTest{}, "name"))
	AssertEqual(t, false, DB.Migrator().HasIndex(&UniqueTest{}, "name_1"))
	AssertEqual(t, false, DB.Migrator().HasIndex(&UniqueTest{}, "name_2"))

	ct, err = findColumnType(&UniqueTest{}, "name")
	if err != nil {
		t.Fatalf("findColumnType err:%v", err)
	}

				name = idx.Name
			}
		}

		return m.DB.Exec("DROP INDEX ? ON ?", clause.Column{Name: name}, m.CurrentTable(stmt)).Error
	})
}

// HasIndex check has index `name` or not
func (m Migrator) HasIndex(value interface{}, name string) bool {
	var count int64
	m.RunWithValue(value, func(stmt *gorm.Statement) error {
		currentDatabase := m.DB.Migrator().CurrentDatabase()

      // at least one element.
      this.expectedValuesPerKey = max(expectedValuesPerKey, 1);

      return this;
    }

    /**
     * By default, if we are handed a value collection bigger than expectedValuesPerKey, presize to
     * accept that many elements.
     *
     * <p>This gets overridden in ImmutableSetMultimap.Builder to only trust the size of {@code