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我正在创建一些新表,我想用数据填充它们以进行测试,我用 mysql 8 遇到了这个问题。

我一直在桌子上使用 null FK,但现在我不知道发生了什么。

我认为是 mysql 8 的东西,我最近更新了,直到现在我还没有遇到问题。

我正在使用 8.0.12。

我得到的错误是:

[23000][1452] 无法添加或更新子行:外键约束失败 ( i2cwac_test. site_board_pins, CONSTRAINT site_board_pins_sensor_types_id_fkFOREIGN KEY ( id) REFERENCES sensor_types( id))

建表脚本:

CREATE TABLE site_board_pins
(
    id bigint(20) PRIMARY KEY NOT NULL AUTO_INCREMENT,
    site_board_id bigint(20) NOT NULL,
    e_board_pin_id bigint(20) NOT NULL,
    pin_type_id bigint(20) NOT NULL,
    pin_operation_mode bigint(20) NULL,
    sensor_type_id bigint(20) NULL,
    enabled bit(1) NOT NULL ,
    description varchar(500),
    CONSTRAINT site_board_pins_site_boards_id_fk FOREIGN KEY (id) REFERENCES site_boards (id),
    CONSTRAINT site_board_pins_e_board_pins_id_fk FOREIGN KEY (id) REFERENCES e_board_pins (id),
    CONSTRAINT site_board_pins_pin_types_id_fk FOREIGN KEY (id) REFERENCES pin_types (id),
    CONSTRAINT site_board_pins_pin_operation_mode_id_fk FOREIGN KEY (id) REFERENCES pin_operation_mode (id),
    CONSTRAINT site_board_pins_sensor_types_id_fk FOREIGN KEY (id) REFERENCES sensor_types (id)
);

插入失败:

INSERT INTO `site_board_pins` (`site_board_id`, `e_board_pin_id`, `pin_type_id`, `pin_operation_mode`, `sensor_type_id`, `enabled`)
VALUES
       ((select id from e_boards where name = 'Iboard Pro 1.1'),
        (select ep.id from e_boards eb join e_board_pins ep on ep.e_board_id = eb.id where eb.name = 'Iboard Pro 1.1' and ep.name = 'A1'),
        (select id from pin_types where mode = 'Analog'),
        NULL,
        NULL,
        0);

提前致谢

4

1 回答 1

1

看起来你搞砸了你的外键定义——所有外键都被声明说你的Id列存在于所有这些其他表中。

例如,我很确定您的第一个是:

CONSTRAINT site_board_pins_site_boards_id_fk FOREIGN KEY (site_board_id) REFERENCES site_boards (id)

于 2018-11-01T14:12:45.560 回答