)

// Model specify the model you would like to run db operations
//
//	// update all users's name to `hello`
//	db.Model(&User{}).Update("name", "hello")
//	// if user's primary key is non-blank, will use it as condition, then will only update that user's name to `hello`
//	db.Model(&user).Update("name", "hello")
func (db *DB) Model(value interface{}) (tx *DB) {
	tx = db.getInstance()
	tx.Statement.Model = value
	return
}

	return m.DB.Exec("DROP VIEW IF EXISTS ?", clause.Table{Name: name}).Error
}

// GuessConstraintAndTable guess statement's constraint and it's table based on name
//
// Deprecated: use GuessConstraintInterfaceAndTable instead.
func (m Migrator) GuessConstraintAndTable(stmt *gorm.Statement, name string) (*schema.Constraint, *schema.CheckConstraint, string) {

						}
					}
				}

				onConflict.DoUpdates = append(onConflict.DoUpdates, clause.AssignmentColumns(columns)...)
				if len(onConflict.DoUpdates) == 0 {
					onConflict.DoNothing = true
				}

				// use primary fields as default OnConflict columns
				if len(onConflict.Columns) == 0 {
					for _, field := range stmt.Schema.PrimaryFields {
						onConflict.Columns = append(onConflict.Columns, clause.Column{Name: field.DBName})

					return tx.callbacks.Create().Execute(tx)
				}
			}
		}

		fallthrough
	default:
		selectedUpdate := len(tx.Statement.Selects) != 0
		// when updating, use all fields including those zero-value fields
		if !selectedUpdate {
			tx.Statement.Selects = append(tx.Statement.Selects, "*")
		}

		updateTx := tx.callbacks.Update().Execute(tx.Session(&Session{Initialized: true}))

			rel.Schema = joinSchema
			joinSchema.Relationships.Relations[name] = rel
		}
	}
	relation.JoinTable = joinSchema

	return nil
}

// Use use plugin
func (db *DB) Use(plugin Plugin) error {
	name := plugin.Name()
	if _, ok := db.Plugins[name]; ok {
		return ErrRegistered
	}
	if err := plugin.Initialize(db); err != nil {
		return err
	}

		}

		if primaryKeyField == nil {
			schema.err = fmt.Errorf("invalid polymorphic type %v for %v on field %s, missing primaryKey field",
				relation.FieldSchema, schema, field.Name)
			return
		}

		// use same data type for foreign keys
		if copyableDataType(primaryKeyField.DataType) {
			relation.Polymorphic.PolymorphicID.DataType = primaryKeyField.DataType
		}

			return nil, fmt.Errorf("%w: %+v", ErrUnsupportedDataType, dest)
		}
		return nil, fmt.Errorf("%w: %s.%s", ErrUnsupportedDataType, modelType.PkgPath(), modelType.Name())
	}

	// Cache the Schema for performance,
	// Use the modelType or modelType + schemaTable (if it present) as cache key.
	var schemaCacheKey interface{}
	if specialTableName != "" {
		schemaCacheKey = fmt.Sprintf("%p-%s", modelType, specialTableName)
	} else {

		if _, ok := fieldValue.Interface().(GormDataTypeInterface); !ok {
			if v, err := valuer.Value(); reflect.ValueOf(v).IsValid() && err == nil {
				fieldValue = reflect.ValueOf(v)
			}

			// Use the field struct's first field type as data type, e.g: use `string` for sql.NullString
			var getRealFieldValue func(reflect.Value)
			getRealFieldValue = func(v reflect.Value) {
				var (
					rv     = reflect.Indirect(v)
					rvType = rv.Type()