Mango in CouchDB 2.0

[tammoippen]

I want to use CouchDB 2 in a private project and plan to use the new mango queries. Here I implemented the wrappers for the new endpoints:

• method find corresponds to endpoint POST /{db}/_find
• method explain corresponds to endpoint POST /{db}/_explain
• the methods index, add_index and remove_index correspond to GET /{db}/_index, POST /{db}/_index and DELETE /{db}/_index/{designdoc}/json/{name}

Further, I added the _selector filter in the changes method.

I wrote tests for the new methods, but since they only work for CouchDB >= 2.0.0. I skip those test in case CouchDB < 2.0.0.

Finally, I needed to change the http::Resource::_request method to allow multiple path elements in a request (for remove_index).

Should solve #300 and partly #306 .

[danballance]

This looks great to me from reading the code. I've not got time right now to test it, but I'd definitely support what this PR is trying to achieve. I did something similar in a fork for my project but never found the time to get the tests together and for that reason haven't sent in a PR. I'd happily switch to this though and drop my fork :+1:

[tammoippen]

@djc Are there still changes requested, that I overlooked? Is there something holding this PR back?

[djc]

The only changes I'd like to have done or a bit meta; rearranging your commits so that they make a logical series of commits (that is, without things like "Apply requested changes" or "Revert unwanted changes"). I was going to do this myself, but if you are up for it you don't have to wait for me. I've been very busy the past weeks, which is why I haven't gotten to it, but I expect to merge it by next week if redoing the commits is up to me. (I can give a bit more detail if you want to do it.)

[tammoippen]

I can do that.

[tammoippen]

@djc Done.

[djc]

Thanks! I swizzled it a little more (mostly allocating some of the random bits and pieces from your last commit to earlier commits) and pushed it to master. Would it be convenient for you if I push this as a release?

[tammoippen]

@djc I am good with working with master for now. When I run into more 2.0 related issues (I know of some already), I will eventually provide PRs (if time permits).

[djc]

Cool, looking forward to it!

[vvasuki]

sudo pip install git+https://github.com/djc/couchdb-python@master does not update my copy of client.py with these wonderful additions I see in the latest version.. Any idea why?

[djc]

Not really. Are you loading the correct copy of the library into your application? Maybe ask the pip folks about it.