mirror of
https://gitlab2.federez.net/re2o/re2o
synced 2024-11-07 10:26:25 +00:00
405 lines
16 KiB
Python
405 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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"""
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modelviz.py - DOT file generator for Django Models
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Based on:
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Django model to DOT (Graphviz) converter
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by Antonio Cavedoni <antonio@cavedoni.org>
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Adapted to be used with django-extensions
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"""
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import datetime
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import os
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import re
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import six
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from django.apps import apps
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from django.db.models.fields.related import (
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ForeignKey, ManyToManyField, OneToOneField, RelatedField,
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)
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from django.contrib.contenttypes.fields import GenericRelation
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from django.template import Context, Template, loader
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from django.utils.encoding import force_bytes, force_str
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from django.utils.safestring import mark_safe
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from django.utils.translation import activate as activate_language
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__version__ = "1.1"
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__license__ = "Python"
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__author__ = "Bas van Oostveen <v.oostveen@gmail.com>",
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__contributors__ = [
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"Antonio Cavedoni <http://cavedoni.com/>"
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"Stefano J. Attardi <http://attardi.org/>",
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"limodou <http://www.donews.net/limodou/>",
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"Carlo C8E Miron",
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"Andre Campos <cahenan@gmail.com>",
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"Justin Findlay <jfindlay@gmail.com>",
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"Alexander Houben <alexander@houben.ch>",
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"Joern Hees <gitdev@joernhees.de>",
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"Kevin Cherepski <cherepski@gmail.com>",
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"Jose Tomas Tocino <theom3ga@gmail.com>",
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"Adam Dobrawy <naczelnik@jawnosc.tk>",
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"Mikkel Munch Mortensen <https://www.detfalskested.dk/>",
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"Andrzej Bistram <andrzej.bistram@gmail.com>",
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]
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def parse_file_or_list(arg):
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if not arg:
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return []
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if isinstance(arg, (list, tuple, set)):
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return arg
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if ',' not in arg and os.path.isfile(arg):
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return [e.strip() for e in open(arg).readlines()]
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return [e.strip() for e in arg.split(',')]
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class ModelGraph(object):
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def __init__(self, app_labels, **kwargs):
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self.graphs = []
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self.cli_options = kwargs.get('cli_options', None)
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self.disable_fields = kwargs.get('disable_fields', False)
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self.include_models = parse_file_or_list(
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kwargs.get('include_models', "")
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)
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self.all_applications = kwargs.get('all_applications', False)
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self.use_subgraph = kwargs.get('group_models', False)
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self.verbose_names = kwargs.get('verbose_names', False)
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self.inheritance = kwargs.get('inheritance', True)
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self.relations_as_fields = kwargs.get("relations_as_fields", True)
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self.sort_fields = kwargs.get("sort_fields", True)
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self.language = kwargs.get('language', None)
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if self.language is not None:
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activate_language(self.language)
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self.exclude_columns = parse_file_or_list(
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kwargs.get('exclude_columns', "")
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)
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self.exclude_models = parse_file_or_list(
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kwargs.get('exclude_models', "")
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)
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if self.all_applications:
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self.app_labels = [app.label for app in apps.get_app_configs()]
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else:
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self.app_labels = app_labels
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def generate_graph_data(self):
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self.process_apps()
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nodes = []
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for graph in self.graphs:
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nodes.extend([e['name'] for e in graph['models']])
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for graph in self.graphs:
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for model in graph['models']:
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for relation in model['relations']:
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if relation is not None:
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if relation['target'] in nodes:
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relation['needs_node'] = False
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def get_graph_data(self, as_json=False):
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now = datetime.datetime.now()
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graph_data = {
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'created_at': now.strftime("%Y-%m-%d %H:%M"),
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'cli_options': self.cli_options,
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'disable_fields': self.disable_fields,
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'use_subgraph': self.use_subgraph,
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}
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if as_json:
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graph_data['graphs'] = [context.flatten() for context in self.graphs]
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else:
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graph_data['graphs'] = self.graphs
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return graph_data
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def add_attributes(self, field, abstract_fields):
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if self.verbose_names and field.verbose_name:
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label = force_bytes(field.verbose_name)
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if label.islower():
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label = label.capitalize()
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else:
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label = field.name
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t = type(field).__name__
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if isinstance(field, (OneToOneField, ForeignKey)):
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remote_field = field.remote_field if hasattr(field, 'remote_field') else field.rel # Remove me after Django 1.8 is unsupported
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t += " ({0})".format(remote_field.field_name)
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# TODO: ManyToManyField, GenericRelation
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return {
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'name': field.name,
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'label': label,
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'type': t,
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'blank': field.blank,
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'abstract': field in abstract_fields,
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'relation': isinstance(field, RelatedField),
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'primary_key': field.primary_key,
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}
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def add_relation(self, field, model, extras=""):
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if self.verbose_names and field.verbose_name:
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label = force_bytes(field.verbose_name)
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if label.islower():
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label = label.capitalize()
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else:
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label = field.name
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# show related field name
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if hasattr(field, 'related_query_name'):
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related_query_name = field.related_query_name()
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if self.verbose_names and related_query_name.islower():
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related_query_name = related_query_name.replace('_', ' ').capitalize()
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label = '{} ({})'.format(label, force_str(related_query_name))
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# handle self-relationships and lazy-relationships
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remote_field = field.remote_field if hasattr(field, 'remote_field') else field.rel # Remove me after Django 1.8 is unsupported
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remote_field_model = remote_field.model if hasattr(remote_field, 'model') else remote_field.to # Remove me after Django 1.8 is unsupported
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if isinstance(remote_field_model, six.string_types):
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if remote_field_model == 'self':
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target_model = field.model
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else:
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if '.' in remote_field_model:
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app_label, model_name = remote_field_model.split('.', 1)
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else:
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app_label = field.model._meta.app_label
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model_name = remote_field_model
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target_model = apps.get_model(app_label, model_name)
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else:
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target_model = remote_field_model
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_rel = self.get_relation_context(target_model, field, label, extras)
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if _rel not in model['relations'] and self.use_model(_rel['target']):
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return _rel
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def get_abstract_models(self, appmodels):
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abstract_models = []
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for appmodel in appmodels:
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abstract_models += [abstract_model for abstract_model in
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appmodel.__bases__ if
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hasattr(abstract_model, '_meta') and
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abstract_model._meta.abstract]
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abstract_models = list(set(abstract_models)) # remove duplicates
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return abstract_models
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def get_app_context(self, app):
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return Context({
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'name': '"%s"' % app.name,
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'app_name': "%s" % app.name,
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'cluster_app_name': "cluster_%s" % app.name.replace(".", "_"),
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'models': []
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})
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def get_appmodel_attributes(self, appmodel):
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if self.relations_as_fields:
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attributes = [field for field in appmodel._meta.local_fields]
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else:
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# Find all the 'real' attributes. Relations are depicted as graph edges instead of attributes
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attributes = [field for field in appmodel._meta.local_fields if not
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isinstance(field, RelatedField)]
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return attributes
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def get_appmodel_abstracts(self, appmodel):
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return [abstract_model.__name__ for abstract_model in
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appmodel.__bases__ if
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hasattr(abstract_model, '_meta') and
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abstract_model._meta.abstract]
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def get_appmodel_context(self, appmodel, appmodel_abstracts):
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context = {
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'app_name': appmodel.__module__.replace(".", "_"),
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'name': appmodel.__name__,
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'abstracts': appmodel_abstracts,
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'fields': [],
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'relations': []
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}
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if self.verbose_names and appmodel._meta.verbose_name:
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context['label'] = force_bytes(appmodel._meta.verbose_name)
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else:
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context['label'] = context['name']
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return context
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def get_bases_abstract_fields(self, c):
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_abstract_fields = []
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for e in c.__bases__:
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if hasattr(e, '_meta') and e._meta.abstract:
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_abstract_fields.extend(e._meta.fields)
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_abstract_fields.extend(self.get_bases_abstract_fields(e))
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return _abstract_fields
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def get_inheritance_context(self, appmodel, parent):
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label = "multi-table"
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if parent._meta.abstract:
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label = "abstract"
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if appmodel._meta.proxy:
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label = "proxy"
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label += r"\ninheritance"
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return {
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'target_app': parent.__module__.replace(".", "_"),
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'target': parent.__name__,
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'type': "inheritance",
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'name': "inheritance",
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'label': label,
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'arrows': '[arrowhead=empty, arrowtail=none, dir=both]',
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'needs_node': True,
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}
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def get_models(self, app):
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appmodels = list(app.get_models())
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return appmodels
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def get_relation_context(self, target_model, field, label, extras):
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return {
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'target_app': target_model.__module__.replace('.', '_'),
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'target': target_model.__name__,
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'type': type(field).__name__,
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'name': field.name,
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'label': label,
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'arrows': extras,
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'needs_node': True
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}
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def process_attributes(self, field, model, pk, abstract_fields):
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newmodel = model.copy()
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if self.skip_field(field) or pk and field == pk:
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return newmodel
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newmodel['fields'].append(self.add_attributes(field, abstract_fields))
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return newmodel
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def process_apps(self):
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for app_label in self.app_labels:
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app = apps.get_app_config(app_label)
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if not app:
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continue
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app_graph = self.get_app_context(app)
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app_models = self.get_models(app)
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abstract_models = self.get_abstract_models(app_models)
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app_models = abstract_models + app_models
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for appmodel in app_models:
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if not self.use_model(appmodel._meta.object_name):
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continue
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appmodel_abstracts = self.get_appmodel_abstracts(appmodel)
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abstract_fields = self.get_bases_abstract_fields(appmodel)
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model = self.get_appmodel_context(appmodel, appmodel_abstracts)
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attributes = self.get_appmodel_attributes(appmodel)
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# find primary key and print it first, ignoring implicit id if other pk exists
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pk = appmodel._meta.pk
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if pk and not appmodel._meta.abstract and pk in attributes:
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model['fields'].append(self.add_attributes(pk, abstract_fields))
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for field in attributes:
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model = self.process_attributes(field, model, pk, abstract_fields)
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if self.sort_fields:
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model = self.sort_model_fields(model)
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for field in appmodel._meta.local_fields:
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model = self.process_local_fields(field, model, abstract_fields)
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for field in appmodel._meta.local_many_to_many:
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model = self.process_local_many_to_many(field, model)
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if self.inheritance:
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# add inheritance arrows
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for parent in appmodel.__bases__:
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model = self.process_parent(parent, appmodel, model)
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app_graph['models'].append(model)
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if app_graph['models']:
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self.graphs.append(app_graph)
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def process_local_fields(self, field, model, abstract_fields):
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newmodel = model.copy()
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if (field.attname.endswith('_ptr_id') or # excluding field redundant with inheritance relation
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field in abstract_fields or # excluding fields inherited from abstract classes. they too show as local_fields
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self.skip_field(field)):
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return newmodel
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if isinstance(field, OneToOneField):
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newmodel['relations'].append(self.add_relation(field, newmodel, '[arrowhead=none, arrowtail=none, dir=both]'))
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elif isinstance(field, ForeignKey):
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newmodel['relations'].append(self.add_relation(field, newmodel, '[arrowhead=none, arrowtail=dot, dir=both]'))
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return newmodel
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def process_local_many_to_many(self, field, model):
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newmodel = model.copy()
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if self.skip_field(field):
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return newmodel
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if isinstance(field, ManyToManyField):
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remote_field = field.remote_field if hasattr(field, 'remote_field') else field.rel # Remove me after Django 1.8 is unsupported
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if hasattr(remote_field.through, '_meta') and remote_field.through._meta.auto_created:
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newmodel['relations'].append(self.add_relation(field, newmodel, '[arrowhead=dot arrowtail=dot, dir=both]'))
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elif isinstance(field, GenericRelation):
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newmodel['relations'].append(self.add_relation(field, newmodel, mark_safe('[style="dotted", arrowhead=normal, arrowtail=normal, dir=both]')))
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return newmodel
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def process_parent(self, parent, appmodel, model):
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newmodel = model.copy()
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if hasattr(parent, "_meta"): # parent is a model
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_rel = self.get_inheritance_context(appmodel, parent)
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# TODO: seems as if abstract models aren't part of models.getModels, which is why they are printed by this without any attributes.
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if _rel not in newmodel['relations'] and self.use_model(_rel['target']):
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newmodel['relations'].append(_rel)
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return newmodel
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def sort_model_fields(self, model):
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newmodel = model.copy()
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newmodel['fields'] = sorted(newmodel['fields'], key=lambda field: (not field['primary_key'], not field['relation'], field['label']))
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return newmodel
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def use_model(self, model_name):
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"""
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Decide whether to use a model, based on the model name and the lists of
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models to exclude and include.
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"""
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# Check against exclude list.
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if self.exclude_models:
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for model_pattern in self.exclude_models:
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model_pattern = '^%s$' % model_pattern.replace('*', '.*')
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if re.search(model_pattern, model_name):
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return False
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# Check against exclude list.
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elif self.include_models:
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for model_pattern in self.include_models:
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model_pattern = '^%s$' % model_pattern.replace('*', '.*')
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if re.search(model_pattern, model_name):
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return True
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# Return `True` if `include_models` is falsey, otherwise return `False`.
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return not self.include_models
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def skip_field(self, field):
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if self.exclude_columns:
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if self.verbose_names and field.verbose_name:
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if field.verbose_name in self.exclude_columns:
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return True
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if field.name in self.exclude_columns:
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return True
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return False
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def generate_dot(graph_data, template='django_extensions/graph_models/digraph.dot'):
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t = loader.get_template(template)
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if not isinstance(t, Template) and not (hasattr(t, 'template') and isinstance(t.template, Template)):
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raise Exception("Default Django template loader isn't used. "
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"This can lead to the incorrect template rendering. "
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"Please, check the settings.")
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c = Context(graph_data).flatten()
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dot = t.render(c)
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return dot
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def generate_graph_data(*args, **kwargs):
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generator = ModelGraph(*args, **kwargs)
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generator.generate_graph_data()
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return generator.get_graph_data()
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def use_model(model, include_models, exclude_models):
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generator = ModelGraph([], include_models=include_models, exclude_models=exclude_models)
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return generator.use_model(model)
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