问题描述
您好我有一个使用迁移模式构建器创建表的问题。
问题出现在具有自引用外键的表中。
这里是产生错误的代码:
$ b $ pre $ $ $ c $ Schema :: create('cb_category',function($ table)
$ table-> integer('id') - > primary() - > unique() - > unsigned();
$ table-> integer ('cb_domain');
$('id') - > ('cb_category') - >整数('parent_id') - > nullable();
$表 - >外('parent_id') - >引用('id') - & - > onUpdate('cascade') - > onDelete('cascade');
$ table-> string('name');
$ table-> integer('level') ;
});
这是错误:
<$ p $ (SQL):[/ b] [/ b] [/ b] [/ b] $ c>
gory 添加约束cb_category_parent_id_foreign外键(
parent_id )引用
cb_category (
id`)del
ete cascade on update cascade)(Bindings:array(
) p>
[PDOException]
SQLSTATE [HY000]:一般错误:1005无法创建表'eklik2。#sql-7d4_e'(errno:150)
有什么想法?
一个创建列,另一个添加FK。 mysql不能同时做两个。
Hi I have a problem to create a table using migration schema builder.The problem occure with table with self referencing foreign key.Here is the code which produce error:
Schema::create('cb_category', function($table)
{
$table->integer('id')->primary()->unique()->unsigned();
$table->integer('domain_id')->unsigned();
$table->foreign('domain_id')->references('id')->on('cb_domain');
$table->integer('parent_id')->nullable();
$table->foreign('parent_id')->references('id')->on('cb_category')->onUpdate('cascade')->onDelete('cascade');
$table->string('name');
$table->integer('level');
});
Here is the error:
SQLSTATE[HY000]: General error: 1005 Can't create table 'eklik2.#sql-7d4_e' (errno: 150) (SQL: alter table `cb_cate
goryadd constraint cb_category_parent_id_foreign foreign key (
parent_id) references
cb_category(
id`) on del ete cascade on update cascade) (Bindings: array ( ))
[PDOException] SQLSTATE[HY000]: General error: 1005 Can't create table 'eklik2.#sql-7d4_e' (errno: 150)
Any idea?
You have to break this into two Schema blocks, one creating the columns, the other adding the FKs. mysql can't do both at the same time.
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