Вставить в вложенные отношения "есть много" - PullRequest
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Вставить в вложенные отношения "есть много"

0 голосов
/ 29 января 2020

У меня есть вложенная структура Go, созданная следующим образом: 

type MainSt struct {
 Id          string `gorm:"primary_key"`
 Field1        string
 Field2      uint8
 Field3        string
 Field4 string
 Field5         string
 Carrots     []Carrot `gorm:"foreignkey:MainStId"`
 Potatos    []Potato `gorm:"foreignkey:MainStId"`
}

type Carrot struct {
 Id        string `gorm:"primary_key"`
 MainStId    string
 Type      uint8
 Arguments []ArgumentsCarrot `gorm:"foreignkey:CarrotId"`
}

type Potato struct {
 Id        string `gorm:"primary_key"`
 MainStId     string
 Type      uint8
 Arguments []ArgumentsPotato `gorm:"foreignkey:PotatoId"`
}

type ArgumentsPotato struct {
 Id    string `gorm:"primary_key"`
 PotatoId string
 Type  uint8 
 Value string
}

type ArgumentsCarrot struct {
 Id    string `gorm:"primary_key"`
 CarrotId string
 Type  uint8
 Value string
}

Теперь я пытаюсь вставить ее в базу данных MySQL. Я делаю это: 

db.AutoMigrate(&MainSt{})
db.AutoMigrate(&Carrot{}).AddForeignKey("main_st_id", "main_st(id)", "CASCADE", "CASCADE")
db.AutoMigrate(&Potato{}).AddForeignKey("main_st_id", "main_st(id)", "CASCADE", "CASCADE")
db.AutoMigrate(&ArgumentsPotato{}).AddForeignKey("potato_id", "potatos(id)", "CASCADE", "CASCADE")
db.AutoMigrate(&ArgumentsCarrot{}).AddForeignKey("carrot_id", "carrots(id)", "CASCADE", "CASCADE")

Затем я готовлю структуру, заполняя все, и начинаю сохранять, используя функцию db.Create(). Но у меня есть некоторые ошибки на внешних ключах. Я установил db.LogMode(true), и вот журналы: 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:58) 
[2020-01-29 00:15:12]  [69.50ms]  CREATE TABLE `main_sts` (`id` varchar(255),`field1` 
varchar(255),`field2` tinyint unsigned,`field3` varchar(255),`field4` varchar(255),`field5` 
varchar(255) , PRIMARY KEY (`id`))  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:59) 
[2020-01-29 00:15:12]  [201.12ms]  CREATE TABLE `carrots` (`id` varchar(255),`main_st_id` 
varchar(255),`type` tinyint unsigned , PRIMARY KEY (`id`))  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:59) 
[2020-01-29 00:15:13]  [172.26ms]  ALTER TABLE `carrots` ADD CONSTRAINT 
carrots_main_st_id_main_sts_id_foreign FOREIGN KEY (main_st_id) REFERENCES main_sts(id) ON 
DELETE CASCADE ON UPDATE CASCADE;  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:60) 
[2020-01-29 00:15:13]  [83.21ms]  CREATE TABLE `potatos` (`id` varchar(255),`main_st_id` 
varchar(255),`type` tinyint unsigned , PRIMARY KEY (`id`))  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:60) 
[2020-01-29 00:15:13]  [208.46ms]  ALTER TABLE `potatos` ADD CONSTRAINT 
potatos_main_st_id_main_sts_id_foreign FOREIGN KEY (main_st_id) REFERENCES main_sts(id) ON 
DELETE CASCADE ON UPDATE CASCADE;  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:61) 
[2020-01-29 00:15:13]  [102.37ms]  CREATE TABLE `arguments_potatos` (`id` 
varchar(255),`potato_id` varchar(255),`type` tinyint unsigned,`value` varchar(255) , PRIMARY 
KEY (`id`))  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:61) 
[2020-01-29 00:15:13]  [228.26ms]  ALTER TABLE `arguments_potatos` ADD CONSTRAINT 
arguments_potatos_potato_id_potatos_id_foreign FOREIGN KEY (potato_id) REFERENCES 
potatos(id) ON DELETE CASCADE ON UPDATE CASCADE;  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:62) 
[2020-01-29 00:15:13]  [91.50ms]  CREATE TABLE `arguments_carrots` (`id` 
varchar(255),`carrot_id` varchar(255),`type` tinyint unsigned,`value` varchar(255) , PRIMARY 
KEY (`id`))  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:62) 
[2020-01-29 00:15:13]  [188.91ms]  ALTER TABLE `arguments_carrots` ADD CONSTRAINT 
arguments_carrots_carrot_id_carrots_id_foreign FOREIGN KEY (carrot_id) REFERENCES carrots(id) 
ON DELETE CASCADE ON UPDATE CASCADE;  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  [0.92ms]  UPDATE `main_sts` SET `field1` = 'F1', `field2` = 0, 
`field3` = 'F3', `field4` = 'F4', `field5` = 'F5'  WHERE `main_sts`.`id` = 'FirstId'  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  [0.23ms]  UPDATE `carrots` SET `main_st_id` = 'FirstId', `type` = 0  
WHERE `carrots`.`id` = 'Middle'  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  [0.26ms]  UPDATE `arguments_carrots` SET `carrot_id` = 'Middle', 
`type` = 0, `value` = 'VAL'  WHERE `arguments_carrots`.`id` = 'Last'  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  [0.32ms]  SELECT * FROM `arguments_carrots`  WHERE 
`arguments_carrots`.`id` = 'Last' ORDER BY `arguments_carrots`.`id` ASC LIMIT 1  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  Error 1452: Cannot add or update a child row: a foreign key constraint 
fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  [0.44ms]  INSERT INTO `arguments_carrots` 
(`id`,`carrot_id`,`type`,`value`) VALUES ('Last','Middle',0,'VAL')  
[0 rows affected or returned ] 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  Error 1452: Cannot add or update a child row: a foreign key constraint 
fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  Error 1452: Cannot add or update a child row: a foreign key constraint 
fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  Error 1452: Cannot add or update a child row: a foreign key constraint 
fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) 

(/Users/disperato/go/src/github.com/disperato/awesomeProject2/main.go:105) 
[2020-01-29 00:15:13]  Error 1452: Cannot add or update a child row: a foreign key constraint 
fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE) 
2020/01/29 00:15:13 Error:Error 1452: Cannot add or update a child row: a foreign key 
constraint fails (`mydatabase`.`arguments_carrots`, CONSTRAINT 
`arguments_carrots_carrot_id_carrots_id_foreign` FOREIGN KEY (`carrot_id`) REFERENCES 
`carrots` (`id`) ON DELETE CASCADE ON UPDATE CASCADE)

Process finished with exit code 1

Я думаю, что это происходит потому, что запрос INSERT на Carrots никогда не запускается. Чего мне не хватает?

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