An extension to bring pyes to Flask with MongoEngine. Currently it only supports indexing
via MongoDB River plugin.

Here is an example to make a index for a MongoEngine document:

class A(db.Document):
  attr1 = db.IntField()
  attr2 = db.StringField()

  meta = {
    'elastic_search': {
      # can use 'name' to specify it's own index name
      # Document type is set to collection name of MongoEngine
      'river': {}, # River settings, look MongoDb River plugin docs
                   # without this key, the river will not be enabled
      'mappings': { # Mapping data, see PyES docs.
        'properties': {
          'attr1': {
            'type': 'int',
            'index': 'not_analyzed'
          },
        }
      }
    }
  }

And to create the river:
# Construct PyESMongoEngine and store it in pyes

# Creates all indexes (removes them if existant) and sets up the rivers.
pyes.recreate_indexes()

# Do search
pyes.search(A, pyes.TermQuery('attr2', 'value1'))
# Similar as pyes.search(pyes.TermQuery('attr2', 'value1'), doc_types = ['a'], indices = ['a'])
# Returns as MongoEngine document objects