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First version of the DjangoMigrationHandler. Created a LodelTestInstance for tests purpose
Some problems are still to solve (see the todo comments in EditorialModel/migrationhandler/django.py )
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147
EditorialModel/migrationhandler/django.py
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EditorialModel/migrationhandler/django.py
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# -*- coding: utf-8 -*-
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import django
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from django.db import models
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from django.contrib import admin
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## @package EditorialModel.migrationhandler.django
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# @brief A migration handler for django ORM
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#
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# Create django models according to the editorial model
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##
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# @source https://code.djangoproject.com/wiki/DynamicModels
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#
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def create_model(name, fields=None, app_label='', module='', options=None, admin_opts=None, parent_class=None):
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class Meta:
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# Using type('Meta', ...) gives a dictproxy error during model creation
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pass
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if app_label:
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# app_label must be set using the Meta inner class
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setattr(Meta, 'app_label', app_label)
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# Update Meta with any options that were provided
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if options is not None:
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for key, value in options.iteritems():
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setattr(Meta, key, value)
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# Set up a dictionary to simulate declarations within a class
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attrs = {'__module__': module, 'Meta':Meta}
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# Add in any fields that were provided
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if fields:
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attrs.update(fields)
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# Create the class, which automatically triggers ModelBase processing
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if parent_class is None:
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parent_class = models.Model
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model = type(name, (parent_class,), attrs)
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# Create an Admin class if admin options were provided
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if admin_opts is not None:
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class Admin(admin.ModelAdmin):
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pass
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for key, value in admin_opts:
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setattr(Admin, key, value)
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admin.site.register(model, Admin)
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return model
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class DjangoMigrationHandler(object):
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app_label = 'lodel'
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def __init__(self, debug=False):
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self.debug = debug
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def register_change(self, uid, initial_state, new_state):
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pass
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def register_model_state(self, state_hash):
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pass
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## @brief Return the models save method
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#
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# The save function of our class and type models is used to set unconditionnaly the
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# classtype, class_name and type_name models property
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#
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# @param classname str: The classname used to call the super().save
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# @param level str: Wich type of model are we doing. Possible values are 'class' and 'type'
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# @param datas list : List of property => value to set in the save function
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# @return The wanted save function
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def get_save_fun(self, classname, level, datas):
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if level == 'class':
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def save(self, *args, **kwargs):
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self.classtype = datas['classtype']
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self.class_name = datas['class_name']
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super(classname, self).save(*args, **kwargs)
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elif level == 'type':
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def save(self, *args, **kwargs):
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self.type_name = datas['type_name']
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super(classname, self).save(*args, **kwargs)
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return save
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## @brief Create django models from an EditorialModel.model object
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# @param me EditorialModel.model.Model : The editorial model instance
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# @return a dict with all the models
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# @todo Handle fieldgroups
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# @todo write and use a function to forge models name from EmClasses and EmTypes names
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# @note There is a problem with the related_name for superiors fk : The related name cannot be subordinates, it has to be the subordinates em_type name
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def me_to_models(self, me, app_label, module_name):
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#Creating the document model
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document_attrs = {
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'lodel_id' : models.AutoField(primary_key=True),
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'classtype': models.CharField(max_length=16, editable=False),
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'class_name': models.CharField(max_length=16, editable=False),
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'type_name': models.CharField(max_length=16, editable=False),
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'string' : models.CharField(max_length=255),
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'date_update': models.DateTimeField(auto_now=True, auto_now_add=True),
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'date_create': models.DateTimeField(auto_now_add=True),
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'rank' : models.IntegerField(),
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'help_text': models.CharField(max_length=255),
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}
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#Creating the base model document
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document_model = create_model('document', document_attrs, app_label, module_name)
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django_models = {'doc' : document_model, 'classes':{}, 'types':{} }
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classes = me.classes()
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#Creating the EmClasses models with document inheritance
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for emclass in classes:
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emclass_fields = {
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'save' : self.get_save_fun(emclass.name, 'class', { 'classtype':emclass.classtype, 'class_name':emclass.name})
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}
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#Addding non optionnal fields
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for emfield in emclass.fields():
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if not emfield.optional:
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# !!! Replace with fieldtype 2 django converter
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emclass_fields[emfield.name] = models.CharField(max_length=56, default=emfield.name)
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print("Model for class %s created with fields : "%emclass.name, emclass_fields)
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django_models['classes'][emclass.name] = create_model(emclass.name, emclass_fields, app_label, module_name, parent_class=django_models['doc'])
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#Creating the EmTypes models with EmClass inherithance
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for emtype in emclass.types():
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emtype_fields = {
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'save': self.get_save_fun(emtype.name, 'type', { 'type_name':emtype.name }),
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}
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#Adding selected optionnal fields
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for emfield in emtype.selected_fields():
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emtype_fields[emfield.name] = models.CharField(max_length=56, default=emfield.name)
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#Adding superiors foreign key
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for nature, superior in emtype.superiors().items():
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emtype_fields[nature] = models.ForeignKey(superior.name, related_name=emtype.name, null=True)
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print("Model for type %s created with fields : "%emtype.name, emtype_fields)
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django_models['types'][emtype.name] = create_model(emtype.name, emtype_fields, app_label, module_name, parent_class=django_models['classes'][emclass.name])
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return django_models
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@ -14,6 +14,7 @@ class DummyMigrationHandler(object):
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## @brief Record a change in the EditorialModel and indicate wether or not it is possible to make it
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## @brief Record a change in the EditorialModel and indicate wether or not it is possible to make it
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# @note The states ( initial_state and new_state ) contains only fields that changes
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# @note The states ( initial_state and new_state ) contains only fields that changes
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# @param context model : The EditorialModel.model object to provide the global context
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# @param uid int : The uid of the change EmComponent
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# @param uid int : The uid of the change EmComponent
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# @param initial_state dict | None : dict with field name as key and field value as value. Representing the original state. None mean creation of a new component.
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# @param initial_state dict | None : dict with field name as key and field value as value. Representing the original state. None mean creation of a new component.
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# @param new_state dict | None : dict with field name as key and field value as value. Representing the new state. None mean component deletion
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# @param new_state dict | None : dict with field name as key and field value as value. Representing the new state. None mean component deletion
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0
LodelTestInstance/__init__.py
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0
LodelTestInstance/__init__.py
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3
LodelTestInstance/admin.py
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3
LodelTestInstance/admin.py
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from django.contrib import admin
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# Register your models here.
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LodelTestInstance/models.py
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15
LodelTestInstance/models.py
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from django.db import models
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from EditorialModel.migrationhandler.django import DjangoMigrationHandler
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from EditorialModel.migrationhandler.dummy import DummyMigrationHandler
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from EditorialModel.model import Model
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from EditorialModel.backend.json_backend import EmBackendJson
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me = Model(EmBackendJson('EditorialModel/test/me.json'), migration_handler = DummyMigrationHandler(True))
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dmh = DjangoMigrationHandler()
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models = dmh.me_to_models(me,'LodelTestInstance', 'LodelTestInstance.models')
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3
LodelTestInstance/tests.py
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3
LodelTestInstance/tests.py
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from django.test import TestCase
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# Create your tests here.
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LodelTestInstance/views.py
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3
LodelTestInstance/views.py
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from django.shortcuts import render
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# Create your views here.
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Django==1.7.8
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Django==1.7.8
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mysqlclient
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