Feature/add uuid attribute

.gitignore

@@ -6,3 +6,6 @@
 _build
 build
 django_eav.egg-info/*
+*.DS_Store
+env/
+.idea/

README.rst

@@ -5,6 +5,7 @@ django-eav
 Introduction
 ------------
 
+
 django-eav provides an Entity-Attribute-Value storage model for django apps.
 
 For a decent explanation of what an Entity-Attribute-Value storage model is,

docs/index.rst

@@ -139,6 +139,9 @@ For example::
 
     eav.register(MyModel, MyEavConfigClass)
 
+To override ``entity_id`` to use ``entity_uuid`` for entity relationship with
+model add ``EAV_ENTITY_ID_TYPE='uuid'`` to use ``entity_uuid`` (defaults to
+int for ``entity_id``)
 
 Using Attributes
 ================
@@ -151,7 +154,7 @@ First, let's create some attributes::
 
     >>> Attribute.objects.create(name='Weight', datatype=Attribute.TYPE_FLOAT)
     >>> Attribute.objects.create(name='Height', datatype=Attribute.TYPE_INT)
-    >>> Attribute.objects.create(name='Is pregant?', datatype=Attribute.TYPE_BOOLEAN)
+    >>> Attribute.objects.create(name='Is pregnant?', datatype=Attribute.TYPE_BOOLEAN)
 
 Now let's create a patient, and set some of these attributes::
 

eav/admin.py

@@ -27,6 +27,7 @@
 
 from .models import Attribute, Value, EnumValue, EnumGroup
 
+
 class BaseEntityAdmin(ModelAdmin):
 
     def render_change_form(self, request, context, add=False, change=False, form_url='', obj=None):
@@ -93,6 +94,7 @@ def get_fieldsets(self, request, obj=None):
 
         return [(None, {'fields': list(form.fields.keys())})]
 
+
 class AttributeAdmin(ModelAdmin):
     list_display = ('name', 'content_type', 'slug', 'datatype', 'description', 'site')
     list_filter = ['site']

eav/migrations/0003_auto_20161104_0922.py

@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.3 on 2016-11-04 09:22
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+import eav.fields
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('eav', '0002_auto_20161014_0157'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Encounter',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('num', models.PositiveSmallIntegerField()),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Patient',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=12)),
+            ],
+        ),
+        migrations.AlterField(
+            model_name='attribute',
+            name='datatype',
+            field=eav.fields.EavDatatypeField(choices=[('text', 'Text'), ('float', 'Float'), ('int', 'Integer'), ('date', 'Date'), ('bool', 'True / False'), ('object', 'Django Object'), ('enum', 'Multiple Choice')], max_length=6, verbose_name='data type'),
+        ),
+        migrations.AddField(
+            model_name='encounter',
+            name='patient',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='eav.Patient'),
+        ),
+        migrations.AddField(
+            model_name='value',
+            name='entity_uuid',
+            field=models.UUIDField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='value',
+            name='entity_id',
+            field=models.IntegerField(blank=True, null=True),
+        ),
+    ]

eav/models.py

@@ -49,6 +49,7 @@
 
 from .validators import *
 from .fields import EavSlugField, EavDatatypeField
+from .utils.utilities import Utils
 
 
 class EnumValue(models.Model):
@@ -86,7 +87,7 @@ class EnumValue(models.Model):
     @python_2_unicode_compatible
     def __str__(self):
         return self.value
-       
+
 
 class EnumGroup(models.Model):
     '''
@@ -304,16 +305,15 @@ def save_value(self, entity, value):
             Attribute and *entity*, it will delete that :class:`Value` object.
         '''
         ct = ContentType.objects.get_for_model(entity)
+        entity_dict = dict(entity_ct=ct,
+                           attribute=self)
+        entity_dict[Value.entity_id_type] = entity.pk
         try:
-            value_obj = self.value_set.get(entity_ct=ct,
-                                           entity_id=entity.pk,
-                                           attribute=self)
+            value_obj = self.value_set.get(**entity_dict)
         except Value.DoesNotExist:
             if value == None or value == '':
                 return
-            value_obj = Value.objects.create(entity_ct=ct,
-                                             entity_id=entity.pk,
-                                             attribute=self)
+            value_obj = Value.objects.create(**entity_dict)
         if value == None or value == '':
             value_obj.delete()
             return
@@ -347,10 +347,13 @@ class Value(models.Model):
     <Value: crazy_dev_user - Favorite Drink: "red bull">
     '''
 
+    entity_id_type = Utils().get_eav_entity_id_type()
+
     entity_ct = models.ForeignKey(ContentType, related_name='value_entities')
-    entity_id = models.IntegerField()
+    entity_id = models.IntegerField(blank=True, null=True)
+    entity_uuid = models.UUIDField(blank=True, null=True)
     entity = generic.GenericForeignKey(ct_field='entity_ct',
-                                       fk_field='entity_id')
+                                       fk_field=entity_id_type)
 
     value_text = models.TextField(blank=True, null=True)
     value_float = models.FloatField(blank=True, null=True)
@@ -521,8 +524,9 @@ def get_values(self):
         '''
         Get all set :class:`Value` objects for self.model
         '''
-        return Value.objects.filter(entity_ct=self.ct,
-                                    entity_id=self.model.pk).select_related()
+        entiity_filter = dict(entity_ct=self.ct)
+        entiity_filter[Value.entity_id_type] = self.model.pk
+        return Value.objects.filter(**entiity_filter).select_related()
 
     def get_all_attribute_slugs(self):
         '''

eav/registry.py

@@ -165,7 +165,7 @@ def _attach_generic_relation(self):
         gr_name = self.config_cls.generic_relation_attr.lower()
         generic_relation = \
                      generic.GenericRelation(Value,
-                                             object_id_field='entity_id',
+                                             object_id_field=Value.entity_id_type,
                                              content_type_field='entity_ct',
                                              related_query_name=rel_name)
         generic_relation.contribute_to_class(self.model_cls, gr_name)

eav/utils/utilities.py

@@ -0,0 +1,16 @@
+from django.conf import settings
+
+
+class Utils(object):
+    ENTITY_ID_TYPES = {
+        'uuid': 'entity_uuid',
+        'int': 'entity_id'
+    }
+
+    def get_eav_entity_id_type(self):
+        key = getattr(settings, 'EAV_ENTITY_ID_TYPE', 'int')
+        try:
+            return self.ENTITY_ID_TYPES[key]
+        except KeyError:
+            print('%s not supported, kindly try uuid or int, defaulting to int' % key)
+        return self.ENTITY_ID_TYPES['int']

requirements.txt

@@ -0,0 +1,2 @@
+Django==1.10.3
+eav-django==1.4.7