updated docs for new Nested syntax

Author: honzakral

docs/persistence.rst

@@ -25,9 +25,11 @@ The mapping definition follows a similar pattern to the query dsl:
  m.field('category', 'text', fields={'raw': Keyword()})
 
  # you can also create a field manually
- comment = Nested()
- comment.field('author', Text())
- comment.field('created_at', Date())
+ comment = Nested(
+ properties={
+ 'author': Text(),
+ 'created_at': Date()
+ })
 
  # and attach it to the mapping
  m.field('comments', comment)
@@ -109,15 +111,19 @@ If you want to create a model-like wrapper around your documents, use the
 
  from datetime import datetime
  from elasticsearch_dsl import DocType, Date, Nested, Boolean, \
- analyzer, InnerObjectWrapper, Completion, Keyword, Text
+ analyzer, InnerDoc, Completion, Keyword, Text
 
  html_strip = analyzer('html_strip',
  tokenizer="standard",
  filter=["standard", "lowercase", "stop", "snowball"],
  char_filter=["html_strip"]
  )
 
- class Comment(InnerObjectWrapper):
+ class Comment(InnerDoc):
+ author = Text(fields={'raw': Keyword()})
+ content = Text(analyzer='snowball')
+ created_at = Date()
+
  def age(self):
  return datetime.now() - self.created_at
 
@@ -131,14 +137,7 @@ If you want to create a model-like wrapper around your documents, use the
  fields={'raw': Keyword()}
  )
 
- comments = Nested(
- doc_class=Comment,
- properties={
- 'author': Text(fields={'raw': Keyword()}),
- 'content': Text(analyzer='snowball'),
- 'created_at': Date()
- }
- )
+ comments = Nested(Comment)
 
  class Meta:
  index = 'blog'