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POupdating many-to-many relationships in asp.net mvc2 using entity framework 4.0 problem
 

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  1. POupdating many-to-many relationships in asp.net mvc2 using entity framework 4.0 problem
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    <p>Can some one point out what I am doing wrong. I went through all related questioin on this site, but I think my problem is more with MYSQL, As the error mentioned.The problem is when I try to update a relationship between two tables using EF in asp.net mvc2.</p> <p>I have these tables and I am using MYSQL.</p> <p>Course</p> <pre><code>+------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +------------+------------------+------+-----+---------+----------------+ | courseid | int(10) unsigned | NO | PRI | NULL | auto_increment | | coursename | varchar(100) | YES | | NULL | | +------------+------------------+------+-----+---------+----------------+ </code></pre> <p>Faculty:</p> <pre><code>+-----------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------+------------------+------+-----+---------+----------------+ | facultyid | int(10) unsigned | NO | PRI | NULL | auto_increment | | firstname | varchar(100) | YES | | NULL | | | lastname | varchar(100) | YES | | NULL | | +-----------+------------------+------+-----+---------+----------------+ </code></pre> <p>And I have this table to create the relationship</p> <pre><code>+-----------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------+------------------+------+-----+---------+-------+ | courseid | int(10) unsigned | NO | MUL | NULL | | | facultyid | int(10) unsigned | NO | MUL | NULL | | +-----------+------------------+------+-----+---------+-------+ </code></pre> <p>Now when I want to associate a course to a faculty, both the course and faculty are existing, using the code below I got a MYSQL error: Below</p> <pre><code>[AcceptVerbs("POST")] public ActionResult AddCourse(int id, FormCollection collection) { //I made this static values for debuging Course course = scheduleEnt.Courses1.First(p =&gt; p.courseid == 5); //existing course Faculty faculty = scheduleEnt.Faculties1.First(p =&gt; p.facultyid == 1); //existing faculty faculty.courses.Add(course); UpdateModel(faculty); scheduleEnt.SaveChanges();//This is where the error generated var cc = 5; return RedirectToAction("AddCourse", new { cid = cc }); } </code></pre> <p>This is the error:</p> <pre><code>You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(SELECT `course_faculty`.`courseid`, `course_faculty`.`facultyid` ' at line 1 </code></pre>
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    1. COI'm getting exactly the same issue, although I'm using EF1 (.net 3.5) and .net connector 6.3.6.0. What's strange is I've got other many-to-many relationships within the same project/edmx that are working without any problem. Trying to get to the bottom of it right now.
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