Merge django-haystack#1460: backend support for Elasticsearch 2.x

Thanks to João Junior (@joaojunior) and Bruno Marques (@ElSaico) for the
patch

Closes django-haystack#1460
Closes django-haystack#1391
Closes django-haystack#1336
Closes django-haystack#1247

.travis.yml

@@ -1,4 +1,4 @@
-sudo: false
+sudo: true
 language: python
 python:
     - 2.7
@@ -26,10 +26,22 @@ addons:
 
 before_install:
     - mkdir -p $HOME/download-cache
+    # See https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html#deb-repo
+    - wget -qO - https://packages.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
+    - >
+      if [[ $VERSION_ES == '>=2.0.0,<3.0.0' ]];
+      then
+        echo "deb http://packages.elastic.co/elasticsearch/2.x/debian stable main" | sudo tee -a /etc/apt/sources.list.d/elasticsearch-2.x.list
+      else
+        echo "deb http://packages.elastic.co/elasticsearch/1.7/debian stable main" | sudo tee -a /etc/apt/sources.list.d/elasticsearch-1.7.list
+      fi
+    - sudo apt-get update
+    - sudo apt-get -y install elasticsearch
+    - sudo service elasticsearch restart
 
 install:
     - pip install --upgrade setuptools
-    - pip install requests "Django${DJANGO_VERSION}"
+    - pip install requests "Django${DJANGO_VERSION}" "elasticsearch${VERSION_ES}"
     - python setup.py clean build install
 
 before_script:
@@ -41,17 +53,17 @@ script:
 
 env:
     matrix:
-        - DJANGO_VERSION=">=1.8,<1.9"
-        - DJANGO_VERSION=">=1.9,<1.10"
-        - DJANGO_VERSION=">=1.10,<1.11"
+        - DJANGO_VERSION=">=1.8,<1.9" VERSION_ES=">=1.0.0,<2.0.0"
+        - DJANGO_VERSION=">=1.9,<1.10" VERSION_ES=">=1.0.0,<2.0.0"
+        - DJANGO_VERSION=">=1.10,<1.11" VERSION_ES=">=1.0.0,<2.0.0"
+        - DJANGO_VERSION=">=1.8,<1.9" VERSION_ES=">=2.0.0,<3.0.0"
+        - DJANGO_VERSION=">=1.9,<1.10" VERSION_ES=">=2.0.0,<3.0.0"
+        - DJANGO_VERSION=">=1.10,<1.11" VERSION_ES=">=2.0.0,<3.0.0"
 
 matrix:
     allow_failures:
         - python: 'pypy'
 
-services:
-    - elasticsearch
-
 notifications:
     irc: "irc.freenode.org#haystack"
     email: false

AUTHORS

@@ -115,3 +115,4 @@ Thanks to
     * Tim Babych (@tymofij) for enabling backend-specific parameters in ``.highlight()``
     * Antony Raj (@antonyr) for adding endswith input type and fixing contains input type
     * Morgan Aubert (@ellmetha) for Django 1.10 support
+    * João Junior (@joaojunior) and Bruno Marques (@ElSaico) for Elasticsearch 2.x support

README.rst

@@ -10,7 +10,7 @@ API that allows you to plug in different search backends (such as Solr_,
 Elasticsearch_, Whoosh_, Xapian_, etc.) without having to modify your code.
 
 .. _Solr: http://lucene.apache.org/solr/
-.. _Elasticsearch: http://elasticsearch.org/
+.. _Elasticsearch: https://www.elastic.co/products/elasticsearch
 .. _Whoosh: https://bitbucket.org/mchaput/whoosh/
 .. _Xapian: http://xapian.org/
 

docs/backend_support.rst

@@ -50,7 +50,7 @@ Elasticsearch
 * Stored (non-indexed) fields
 * Highlighting
 * Spatial search
-* Requires: elasticsearch-py > 1.0 & Elasticsearch 1.0+ (Neither Elasticsearch 2.X `#1247 <https://github.com/django-haystack/django-haystack/issues/1247>`_ nor Elasticsearch 5.X `#1383 <https://github.com/django-haystack/django-haystack/issues/1383>`_ are supported yet.)
+* Requires: `elasticsearch <https://pypi.python.org/pypi/elasticsearch>`_ 1.x or 2.x. Elasticsearch 5.X is currently unsupported: see `#1383 <https://github.com/django-haystack/django-haystack/issues/1383>`_.
 
 Whoosh
 ------

docs/installing_search_engines.rst

@@ -114,9 +114,9 @@ Official Download Location: http://www.elasticsearch.org/download/
 
 Elasticsearch is Java but comes in a pre-packaged form that requires very
 little other than the JRE. It's also very performant, scales easily and has
-an advanced featureset. Haystack currently only supports ElasticSearch 1.x.
-ElasticSearch 2.x is not supported yet, if you would like to help, please see
-`#1247 <https://github.com/django-haystack/django-haystack/issues/1247>`_.
+an advanced featureset. Haystack currently only supports Elasticsearch 1.x and 2.x.
+Elasticsearch 5.x is not supported yet, if you would like to help, please see
+`#1383 <https://github.com/django-haystack/django-haystack/issues/1383>`_.
 
 Installation is best done using a package manager::
 

docs/searchqueryset_api.rst

@@ -304,7 +304,7 @@ Example::
 
     # For SOLR (setting f.author.facet.*; see http://wiki.apache.org/solr/SimpleFacetParameters#Parameters)
     SearchQuerySet().facet('author', mincount=1, limit=10)
-    # For ElasticSearch (see http://www.elasticsearch.org/guide/reference/api/search/facets/terms-facet.html)
+    # For Elasticsearch (see http://www.elasticsearch.org/guide/reference/api/search/facets/terms-facet.html)
     SearchQuerySet().facet('author', size=10, order='term')
 
 In the search results you get back, facet counts will be populated in the