Added _coerce for fields that require it

As discussed in elastic#791. Also fixed some newlines and removed duplicate Percolator.

Author: okke-formsma

elasticsearch_dsl/field.py

@@ -272,6 +272,7 @@ class Keyword(Field):
 
 class Boolean(Field):
  name = 'boolean'
+ _coerce = True
 
  def _deserialize(self, data):
  if data is None:
@@ -287,9 +288,9 @@ def clean(self, data):
  raise ValidationException("Value required for this field.")
  return data
 
-
 class Float(Field):
  name = 'float'
+ _coerce = True
 
  def _deserialize(self, data):
  if data is None:
@@ -305,20 +306,18 @@ class ScaledFloat(Float):
  def __init__(self, scaling_factor, *args, **kwargs):
  super(ScaledFloat, self).__init__(scaling_factor=scaling_factor, *args, **kwargs)
 
-
 class Double(Float):
  name = 'double'
 
-
 class Integer(Field):
  name = 'integer'
+ _coerce = True
 
  def _deserialize(self, data):
  if data is None:
  return None
  return int(data)
 
-
 class Byte(Integer):
  name = 'byte'
 
@@ -330,6 +329,7 @@ class Long(Integer):
 
 class Ip(Field):
  name = 'ip'
+ _coerce = True
 
  def _deserialize(self, data):
  if data is None:
@@ -345,6 +345,7 @@ def _serialize(self, data):
 
 class Binary(Field):
  name = 'binary'
+ _coerce = True
 
  def _deserialize(self, data):
  if data is None:
@@ -391,6 +392,3 @@ class TokenCount(Field):
 
 class Murmur3:
  name = 'murmur3'
-
-class Percolator:
- name = 'percolator'