[英]MYSQL Workbench - ERROR: Error 1215: Cannot add foreign key constraint
I am trying to forward engineer a database on MySQL Workbench, but I continually am getting this error message. 我正在尝试对MySQL Workbench上的数据库进行正向工程设计,但是我一直在收到此错误消息。 I feel as though it is most likely an issue with the structure of my relationships, but I cannot find a discrepancy.
我觉得这很可能是我的人际关系问题,但我找不到差异。
Here is an image of the schema diagram. 这是模式图的图像。
Here is the error message I am receiving: 这是我收到的错误消息:
Executing SQL script in server
ERROR: Error 1215: Cannot add foreign key constraint
SQL Code:
-- -----------------------------------------------------
-- Table `bturpin`.`THREAD`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `bturpin`.`THREAD` (
`id` INT NOT NULL AUTO_INCREMENT,
`answer` DOUBLE NULL,
`comment` VARCHAR(255) NULL,
`test_subcategory_name` VARCHAR(45) NULL,
`RATING_id` INT NOT NULL,
`RATING_INSTRUCTOR_id` VARCHAR(30) NOT NULL,
`RATING_INSTRUCTOR_LESSON_title` VARCHAR(45) NOT NULL,
`RATING_INSTRUCTOR_LESSON_COURSE_num` VARCHAR(15) NOT NULL,
`RATING_RATER_id` VARCHAR(30) NOT NULL,
PRIMARY KEY (`id`, `RATING_id`, `RATING_INSTRUCTOR_id`, `RATING_INSTRUCTOR_LESSON_title`, `RATING_INSTRUCTOR_LESSON_COURSE_num`, `RATING_RATER_id`),
INDEX `fk_THREAD_RATING1_idx` (`RATING_id` ASC, `RATING_INSTRUCTOR_id` ASC, `RATING_INSTRUCTOR_LESSON_title` ASC, `RATING_INSTRUCTOR_LESSON_COURSE_num` ASC, `RATING_RATER_id` ASC),
CONSTRAINT `fk_THREAD_RATING1`
FOREIGN KEY (`RATING_id` , `RATING_INSTRUCTOR_id` , `RATING_INSTRUCTOR_LESSON_title` , `RATING_INSTRUCTOR_LESSON_COURSE_num` , `RATING_RATER_id`)
REFERENCES `bturpin`.`RATING` (`id` , `INSTRUCTOR_id` , `INSTRUCTOR_LESSON_title` , `INSTRUCTOR_LESSON_COURSE_num` , `RATER_id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB
SQL script execution finished: statements: 14 succeeded, 1 failed
Fetching back view definitions in final form.
Nothing to fetch
Try forwarding in this order : 尝试按此顺序转发:
You may also consider using only integer foreign key. 您也可以考虑仅使用整数外键。
This seems to be a MySQL Workbench issue with foreign key on non integer key. 这似乎是MySQL Workbench问题,其中非整数键上带有外键。
Source : Error 1215: Cannot add foreign key constraint 源: 错误1215:无法添加外键约束
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