xpath like string in error message.

[ghost]

The error message in the current ValidationError is not helpful in identifying the invalid tag.

The validator raises error message such as these:

Error1: ["u'name' is a required property"]

We need a better way to identify such errors.
I propose we use a jsonpath-like[1] string that indicates the "path" to the invalid tag.

Ex.

x["persons"][0]["location"]["city"]

In a document like this:

{
  "persons": [
    {
      "location": {
        "city": "New York"
     }
   }
  ]
}

Having this "jsonpath" will aslo make it posible to indicate the row and the line the error has occurred on if you have some sort of tag database.

I am more then willing to implement this feature myself, but I require some pointers to get started.
I am looking for the functions that get called when someone starts validating a new element from an array or a tag from an object.

These functions need to be recursive so I can easily track the parents of the current tag.
Basically to use the function stack as a way to infer the parents of a tag.

[1] http://goessner.net/articles/JsonPath/

[Julian]

Closing as a duplicate of #5 and #12 :).

An implementation detail was making this a bit difficult to do cleanly, but that should be sorted now. So, this should hit for the next release. In fact, I was just pushing out a commit with preliminary support, feel free to try it and let me know how it goes.

Feel free to reopen if you've got more in mind.