Fixed #23028: Added unique_togther support to inspectdb.

django/contrib/gis/management/commands/inspectdb.py

@@ -21,8 +21,8 @@ class Command(InspectDBCommand):
                 self.gis_tables[table_name] = [geo_col]
         return field_type, field_params, field_notes
 
-    def get_meta(self, table_name):
+    def get_meta(self, table_name, constraints):
-        meta_lines = super(Command, self).get_meta(table_name)
+        meta_lines = super(Command, self).get_meta(table_name, constraints)
         if table_name in self.gis_tables:
             # If the table is a geographic one, then we need make
             # GeoManager the default manager for the model.

django/core/management/commands/inspectdb.py

@@ -65,6 +65,10 @@ class Command(BaseCommand):
                     indexes = connection.introspection.get_indexes(cursor, table_name)
                 except NotImplementedError:
                     indexes = {}
+                try:
+                    constraints = connection.introspection.get_constraints(cursor, table_name)
+                except NotImplementedError:
+                    constraints = {}
                 used_column_names = []  # Holds column names used in the table so far
                 for i, row in enumerate(connection.introspection.get_table_description(cursor, table_name)):
                     comment_notes = []  # Holds Field notes, to be displayed in a Python comment.
@@ -135,7 +139,7 @@ class Command(BaseCommand):
                     if comment_notes:
                         field_desc += '  # ' + ' '.join(comment_notes)
                     yield '    %s' % field_desc
-                for meta_line in self.get_meta(table_name):
+                for meta_line in self.get_meta(table_name, constraints):
                     yield meta_line
 
     def normalize_col_name(self, col_name, used_column_names, is_relation):
@@ -232,13 +236,26 @@ class Command(BaseCommand):
 
         return field_type, field_params, field_notes
 
-    def get_meta(self, table_name):
+    def get_meta(self, table_name, constraints):
         """
         Return a sequence comprising the lines of code necessary
         to construct the inner Meta class for the model corresponding
         to the given database table name.
         """
-        return ["",
+        unique_together = []
+        for index, params in constraints.items():
+            if params['unique']:
+                columns = params['columns']
+                if len(columns) > 1:
+                    # we do not want to include the u"" or u'' prefix
+                    # so we build the string rather than interpolate the tuple
+                    tup = '(' + ', '.join("'%s'" % c for c in columns) + ')'
+                    unique_together.append(tup)
+        meta = ["",
                 "    class Meta:",
                 "        managed = False",
                 "        db_table = '%s'" % table_name]
+        if unique_together:
+            tup = '(' + ', '.join(unique_together) + ',)'
+            meta += ["        unique_together = %s" % tup]
+        return meta

docs/releases/1.8.txt

@@ -179,6 +179,8 @@ Management Commands
 
 * :djadmin:`runserver` now uses daemon threads for faster reloading.
 
+* :djadmin:`inspectdb` now outputs ``Meta.unique_together``.
+
 Models
 ^^^^^^
 

tests/inspectdb/models.py

@@ -70,3 +70,11 @@ class ColumnTypes(models.Model):
     text_field = models.TextField()
     time_field = models.TimeField()
     url_field = models.URLField()
+
+
+class UniqueTogether(models.Model):
+    field1 = models.IntegerField()
+    field2 = models.CharField(max_length=10)
+
+    class Meta:
+        unique_together = ('field1', 'field2')

tests/inspectdb/tests.py

@@ -217,6 +217,14 @@ class InspectDBTestCase(TestCase):
         self.longMessage = False
         self.assertIn("        managed = False", output, msg='inspectdb should generate unmanaged models.')
 
+    def test_unique_together_meta(self):
+        out = StringIO()
+        call_command('inspectdb',
+                     table_name_filter=lambda tn: tn.startswith('inspectdb_uniquetogether'),
+                     stdout=out)
+        output = out.getvalue()
+        self.assertIn("        unique_together = (('field1', 'field2'),)", output, msg='inspectdb should generate unique_together.')
+
     @skipUnless(connection.vendor == 'sqlite',
                 "Only patched sqlite's DatabaseIntrospection.data_types_reverse for this test")
     def test_custom_fields(self):