I am doing database migrations using GORM. So I define structs and run them through GORM's AutoMigrate function.
type Person struct {
ID string `gorm:"type:varchar(36);primary_key"`
}
err := db.Table("persons").AutoMigrate(&Person{}).Error
type Address struct {
ID string `gorm:"type:varchar(36);primary_key"`
PersonID string `gorm:"column:person_id;type:varchar(36);NOT NULL"`
}
err = db.AutoMigrate(&Address{}).Error
err = db.Model(&Address{}).AddForeignKey("person_id", "persons(id)", "NO ACTION", "CASCADE").Error
type Contact struct {
ID string `gorm:"type:varchar(36);primary_key"`
AddressID null.String `gorm:"column:address_id;type:varchar(36);NOT NULL"`
PersonID string `gorm:"column:person_id;type:varchar(36);NOT NULL"`
}
err = db.AutoMigrate(&Contact{}).Error
err = db.Model(&Contact{}).AddForeignKey("address_id", "addresses(id)", "NO ACTION", "CASCADE").Error
err = db.Model(&Contact{}).AddForeignKey("person_id", "persons(id)", "NO ACTION", "CASCADE").Error
In the above code, which ever is the second call to the AddForeignKey function on Contacts table is giving error :
mssql: Could not create constraint or index. See previous errors.
Even if I move person_id foreign key above address_id foreign key, then address_id foreign key fails.
I am running MS-SQL server using latest docker container setup(microsoft/mssql-server-linux:latest). Is this something regarding naming of constraint. If yes, then how can we set using GORM? Everything works fine with My-SQL.
It would be really helpful if I get a solution. I cannot run raw queries. Migrations have to be done using GORM only.
Thank You
Multiple foreignkeys can't have 'no action', 'cascade' on the same table. If u use no action, no action u can but u have to handle deletion and updating your self. What I usually do is turn on logmode and copy paste the log sql statement into SQL. This will give ua more clear error.
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