<s> import json <EOL> from django . db . models . signals import post_save , post_delete <EOL> from django . core import serializers <EOL> from . settings import project_name , MODEL_DEFAULTS <EOL> from hedwig . core . settings import Settings <EOL> from . emitter import hedwig_emitter <EOL> import inspect <EOL> import logging <EOL> LOGGER = logging . getLogger ( __name__ ) <EOL> def coerce_model_settings ( instance ) : <EOL> model_hedwig_dict = { } <EOL> model_hedwig = getattr ( instance , '<STR_LIT>' , None ) <EOL> if inspect . isclass ( model_hedwig ) : <EOL> model_hedwig_dict = dict ( ( name , getattr ( model_hedwig , name ) ) for name in dir ( model_hedwig ) if not name . startswith ( '<STR_LIT>' ) ) <EOL> return Settings ( user_settings = model_hedwig_dict , defaults = MODEL_DEFAULTS ) <EOL> def saved_hedwig_models ( sender , instance , created , ** kwargs ) : <EOL> if created : <EOL> action = '<STR_LIT>' <EOL> else : <EOL> action = '<STR_LIT>' <EOL> emit_hedwig_model_data ( instance , action ) <EOL> def deleted_hedwig_models ( sender , instance , ** kwargs ) : <EOL> emit_hedwig_model_data ( instance , '<STR_LIT>' ) <EOL> def emit_hedwig_model_data ( instance , action ) : <EOL> model_settings = coerce_model_settings ( instance ) <EOL> if not getattr ( model_settings , action , True ) : <EOL> return True <EOL> routing_key = '<STR_LIT:.>' . join ( [ project_name , instance . _meta . app_label , '<STR_LIT>' , instance . _meta . object_name , action , <EOL> str ( instance . pk ) ] ) <EOL> show_fields = True <EOL> serializer_kwargs = { } <EOL> if isinstance ( model_settings . fields , bool ) : <EOL> show_fields = model_settings . fields <EOL> else : <EOL> serializer_kwargs [ '<STR_LIT>' ] = model_settings . fields <EOL> hedwig_json_obj = { } <EOL> if show_fields : <EOL> serializer_kwargs [ '<STR_LIT>' ] = model_settings . natural_primary_keys <EOL> serializer_kwargs [ '<STR_LIT>' ] = model_settings . natural_foreign_keys <EOL> serializer_kwargs [ '<STR_LIT>' ] = "<STR_LIT>" <EOL> serializer_kwargs [ '<STR_LIT>' ] = [ instance ] <EOL> try : <EOL> hedwig_json_obj = json . loads ( serializers . serialize ( ** serializer_kwargs ) ) [ <NUM_LIT:0> ] <EOL> except Exception as e : <EOL> hedwig_json_obj = { '<STR_LIT:error>' : str ( e ) } <EOL> payload = json . dumps ( hedwig_json_obj ) <EOL> hedwig_emitter . emit ( routing_key , payload ) <EOL> def register_hedwig_callbacks ( ) : <EOL> LOGGER . info ( "<STR_LIT>" ) <EOL> post_save . connect ( saved_hedwig_models , weak = False , dispatch_uid = "<STR_LIT>" ) <EOL> post_delete . connect ( deleted_hedwig_models , weak = False , dispatch_uid = "<STR_LIT>" ) </s>
