From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Fri, 2 Dec 2005 08:45:38 +0000 (+0000)
Subject: new test to check a new eager loader feature that loads against aliased names
X-Git-Tag: rel_0_1_0~280
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4b70825ae175483addf51b0848faa99bff3d7283;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

new test to check a new eager loader feature that loads against aliased names
---

diff --git a/test/double.py b/test/double.py
new file mode 100644
index 0000000000..e82f767092
--- /dev/null
+++ b/test/double.py
@@ -0,0 +1,91 @@
+from sqlalchemy import *
+import testbase
+import string
+
+class Place(object):
+    '''represents a place'''
+    def __init__(self, name=None):
+        self.name = name
+
+class Transition(object):
+    '''represents a transition'''
+    def __init__(self, name=None):
+        self.name = name
+        self.inputs = []
+        self.outputs = []
+    def __repr__(self):
+        return object.__repr__(self)+ " " + repr(self.inputs) + " " + repr(self.outputs)
+        
+class DoubleTest(testbase.AssertMixin):
+    def setUpAll(self):
+        db = testbase.db
+        global place
+        place = Table('place', db,
+            Column('place_id', Integer, primary_key=True),
+            Column('name', String(30), nullable=False),
+            )
+
+        global transition
+        transition = Table('transition', db,
+            Column('transition_id', Integer, primary_key=True),
+            Column('name', String(30), nullable=False),
+            )
+
+        # association table #1
+        global place_input
+        place_input = Table('place_input', db,
+            Column('place_id', Integer, ForeignKey('place.place_id')),
+            Column('transition_id', Integer, ForeignKey('transition.transition_id')),
+            )
+
+        # association table #2
+        global place_output
+        place_output = Table('place_output', db,
+            Column('place_id', Integer, ForeignKey('place.place_id')),
+            Column('transition_id', Integer, ForeignKey('transition.transition_id')),
+            )
+
+        place.create()
+        transition.create()
+        place_input.create()
+        place_output.create()
+
+    def tearDownAll(self):
+        place_input.drop()
+        place_output.drop()
+        place.drop()
+        transition.drop()
+
+    def setUp(self):
+        objectstore.clear()
+        clear_mappers()
+
+    def testdouble(self):
+        """tests that a mapper can have two eager relations to the same table, via
+        two different association tables.  aliases are required."""
+
+        Place.mapper = mapper(Place, place)
+        Transition.mapper = mapper(Transition, transition, properties = dict(
+            inputs = relation(Place.mapper, place_output, lazy=False, selectalias='op_alias'),
+            outputs = relation(Place.mapper, place_input, lazy=False, selectalias='ip_alias'),
+            )
+        )
+
+        tran = Transition('transition1')
+        tran.inputs.append(Place('place1'))
+        tran.outputs.append(Place('place2'))
+        tran.outputs.append(Place('place3'))
+        objectstore.commit()
+
+        objectstore.clear()
+        r = Transition.mapper.select()
+        self.assert_result(r, Transition, 
+            {'name':'transition1', 
+            'inputs' : (Place, [{'name':'place1'}]),
+            'outputs' : (Place, [{'name':'place2'}, {'name':'place3'}])
+            }
+            )    
+
+if __name__ == "__main__":    
+    testbase.main()
+