Hi all!

I’m trying to update an entity and I don’t know if I using the correct approach.

I’m using the mysql backend and I’ve receiving this error every time I call Entity’s constructor:

Error: immutable field: id
at Object.set (/Users/leandro/w/persistencejs/lib/persistence.js:67:51)
at Observable.Entity (/Users/leandro/w/persistencejs/lib/persistence.js:493:25)
at /Users/leandro/w/proj/entity.js:60:16

Am I doing something wrong?

Best regards.
Leandro.

================================

this.Entity = persistence.define(‘Entity’, tableInfo);

update: function(id, entity) {
var that = this;
var session = persistenceStore.getSession();

	session.transaction(function(tx) 
	{
		session.add(new that.Entity(session, entity));	
		
		session.flush(tx, function()
		{
			session.close();
		});
	});
}

Submitted by leandro batista on 31 December 2010 at 04:48

Hi Leandro, what’s in the entity variable there? If it’s something that has an id property, that may be causing the problem.

Hi Zef,

The entity variable holds a value that was generated by bodyDecoder, a middleware connect’s function. (http://senchalabs.github.com/connect/bodyDecoder.html)

Here the snippet:

exports.update = function(req, res, next) {
var id = req.params.id;
// req.body contais a json and what generated by bodyDecoder()
// it looks like a simple json object.

var new_entity = req.body;

Entity.Collection.update(id, new_entity);

};

Thank you.
[ ]s
leandro.

The problems seems to be that it tries to set the .id field from the req.body, which is immutable. If you make sure that req.body no longer contains the id field it should work. For instance using:

delete req.body.id;