The backbone model's validate() function should match the predicates determined by the Django model's fields

[thedrow]

User Story

As a web client I want to be able to validate the correctness of a model on the client side so that I will be able to get a more responsive answer about the model's correctness.

Example

    class TestModel(DjangoModel):
        test_id = fields.AutoField(primary_key=True)
        number = fields.IntegerField(default=1)
        string = fields.CharField(max_length=50, default="foo")

Should produce the following function:

{
//...
  validate: function()
  {
    if (typeof(this.get("test_id") != "number" && this.get("test_id") != null)
      return false;
    if (typeof(this.get("number ") != "number" && this.get("number ") != null)
      return false;
    if(this.get("string").length > 50 || (typeof(this.get("string") != "string" && this.get("string") != null)
      return false;
    return true;
  }
  //...
}