我正在尝试通过工匠迁移创建
MySQL触发器.
DB::unprepared('
DELIMITER $$
CREATE TRIGGER cascade_courseAffinity_after_facultyAffinity
AFTER DELETE ON faculty_affinities
FOR EACH ROW
BEGIN
DELETE ca
FROM course_affinities AS ca
JOIN courses AS course1 ON ca.course1_id = course1.id
JOIN courses AS course2 ON ca.course2_id = course2.id
WHERE (course1.faculty_id = OLD.faculty1_id OR course1.faculty_id = OLD.faculty2_id)
AND (course2.faculty_id = OLD.faculty1_id OR course2.faculty_id = OLD.faculty2_id);
END
$$
');
然而,当我运行迁移时,我收到错误
SQLSTATE[]: Syntax error... near DELIMITER $$at line 1
帮助他人?
编辑1:这是我在MySQL上使用的迁移文件
创建“课程”表,其中包含与教师(faculty_id)的一对多关系.
Schema::create('courses', function (Blueprint $table) {
$table->increments('id');
$table->string('name', 150);
$table->integer('faculty_id')->unsigned();
$table->foreign('faculty_id')->references('id')->on('faculties');
$table->boolean('active')->default(1);
//$table->softDeletes();
});
创建“faculties”表.
Schema::create('faculties', function (Blueprint $table) {
$table->increments('id');
$table->string('name', 150)->unique();
$table->boolean('active')->default(1);
//$table->softDeletes();
});
创建“course_affinities”表,其中包含课程之间的多对多关系自我关系.
Schema::create('course_affinities', function (Blueprint $table) {
$table->increments('id');
$table->integer('course1_id')->unsigned();
$table->foreign('course1_id')->references('id')->on('courses');
$table->integer('course2_id')->unsigned();
$table->foreign('course2_id')->references('id')->on('courses');
$table->boolean('active')->default(1);
//$table->softDeletes();
});
创建“faculty_affinities”表,其中包含各个院系之间的多对多关系.
Schema::create('faculty_affinities', function (Blueprint $table) {
$table->increments('id');
$table->integer('faculty1_id')->unsigned();
$table->foreign('faculty1_id')->references('id')->on('faculties');
$table->integer('faculty2_id')->unsigned();
$table->foreign('faculty2_id')->references('id')->on('faculties');
$table->boolean('active')->default(1);
//$table->softDeletes();
});
最佳答案 问题出在DELIMITER命令中.此命令仅用于MySQL客户端.所以,你不能在Laravel中使用它.
花点时间阅读这篇文章:Creating MYSQL Procedure in Laravel 4 Migrations
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