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How to bind table fields in migrations?
Greetings, I ask for help, I have been trying to solve the problem for more than one day.
I'm using a migration file in Yii2 to create a database, all tables and elements are created normally, but when I try to bind one field to another, the console writes an error: "errno 150 foreign key constraint is incorrectly formed". What am I doing wrong, tell me please?
public function up()
{
$tableOptions = null;
if ($this->db->driverName === 'mysql') {
$tableOptions = 'CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE=InnoDB';
}
// Организации
$this->createTable('{{%company}}', [
'id' => $this->primaryKey(),
'name' => $this->string(),
'code' => $this->string(),
'city' => $this->string(),
'address' => $this->string(),
'schedule' => $this->string(),
'link' => $this->string(),
], $tableOptions);
// Телефоны
$this->createTable('{{%phone}}', [
'id' => $this->primaryKey(),
'company' => $this->string(),
'number' => $this->string(),
], $tableOptions);
$this->addForeignKey("fk-phone-company", "{{%phone}}", "company", "{{%company}}", "name", 'SET NULL', 'RESTRICT');
}
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Your fields "{{%phone}}.company" and "{{%company}}.name" are not indexed, so no external link is created.
And why are you linking on the fields "{{%phone}}.company" and "{{%company}}.name"? You also have a primaryKey in each table.
I would do like this:
public function up()
{
$tableOptions = null;
if ($this->db->driverName === 'mysql') {
$tableOptions = 'CHARACTER SET utf8 COLLATE utf8_unicode_ci ENGINE=InnoDB';
}
// Организации
$this->createTable('{{%company}}', [
'id' => $this->primaryKey(),
'name' => $this->string(),
'code' => $this->string(),
'city' => $this->string(),
'address' => $this->string(),
'schedule' => $this->string(),
'link' => $this->string(),
], $tableOptions);
// Телефоны
$this->createTable('{{%phone}}', [
'id' => $this->primaryKey(),
'company_id' => $this->integer(),
'number' => $this->string(),
], $tableOptions);
$this->createIndex('idx-phone-company_id', '{{%phone}}', 'company_id');
$this->addForeignKey("fk-phone-company", "{{%phone}}", "company_id", "{{%company}}", "id", 'SET NULL', 'RESTRICT');
}
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