elasticsearch.py 文件源码

def setup(self):
        """
        Defers loading until needed.
        """
        # Get the existing mapping & cache it. We'll compare it
        # during the ``update`` & if it doesn't match, we'll put the new
        # mapping.
        try:
            self.existing_mapping = self.conn.indices.get_mapping(index=self.index_name)
        except NotFoundError:
            pass
        except Exception:
            if not self.silently_fail:
                raise

        unified_index = haystack.connections[self.connection_alias].get_unified_index()
        self.content_field_name, field_mapping = self.build_schema(unified_index.all_searchfields())
        # fixing ES 1.x/2.x compatible `_boost`
        current_mapping = {
            'modelresult': {
                'properties': field_mapping,
            }
        }
        if elasticsearch.VERSION < (2, 0, 0):
            current_mapping['modelresult']['_boost'] = {
                'name': 'boost',
                'null_value': 1.0
            }
        # end fixing ES 1.x/2.x compatible `_boost`

        if current_mapping != self.existing_mapping:
            try:
                # Make sure the index is there first.
                self.conn.indices.create(index=self.index_name, body=self.DEFAULT_SETTINGS, ignore=400)
                self.conn.indices.put_mapping(index=self.index_name, doc_type='modelresult', body=current_mapping)
                self.existing_mapping = current_mapping
            except Exception:
                if not self.silently_fail:
                    raise

        self.setup_complete = True