From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Sun, 29 Jan 2006 21:51:59 +0000 (+0000)
Subject: added to trunk
X-Git-Tag: rel_0_1_0~90
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0078b7103edfbbe7111fdf1780dd97cfc292fb4;p=thirdparty%2Fsqlalchemy%2Fsqlalchemy.git

added to trunk
---

diff --git a/test/cycles.py b/test/cycles.py
new file mode 100644
index 0000000000..96ba1e264f
--- /dev/null
+++ b/test/cycles.py
@@ -0,0 +1,172 @@
+from testbase import PersistTest, AssertMixin
+import unittest, sys, os
+from sqlalchemy import *
+import StringIO
+import testbase
+
+from tables import *
+import tables
+
+objectstore.LOG = True
+
+class Tester(object):
+    def __init__(self, data=None):
+        self.data = data
+        print repr(self) + " (%d)" % (id(self))
+    def __repr__(self):
+        return "%s(%s)" % (self.__class__.__name__, repr(self.data))
+        
+class SelfCycleTest(AssertMixin):
+    """tests a self-referential mapper, with an additional list of child objects."""
+    def setUpAll(self):
+        testbase.db.tables.clear()
+        global t1
+        global t2
+        t1 = Table('t1', testbase.db, 
+            Column('c1', Integer, primary_key=True),
+            Column('parent_c1', Integer, ForeignKey('t1.c1')),
+            Column('data', String(20))
+        )
+        t2 = Table('t2', testbase.db,
+            Column('c1', Integer, primary_key=True),
+            Column('c1id', Integer, ForeignKey('t1.c1')),
+            Column('data', String(20))
+        )
+        t1.create()
+        t2.create()
+    def tearDownAll(self):
+        t1.drop()    
+        t2.drop()
+    def setUp(self):
+        objectstore.clear()
+        clear_mappers()
+    
+    def testcycle(self):
+        class C1(Tester):
+            pass
+        class C2(Tester):
+            pass
+        
+        m1 = mapper(C1, t1, properties = {
+            'c1s' : relation(C1),
+            'c2s' : relation(C2, t2)
+        })
+
+        a = C1('head c1')
+        a.c1s.append(C1('child1'))
+        a.c1s.append(C1('child2'))
+        a.c1s[0].c1s.append(C1('subchild1'))
+        a.c1s[0].c1s.append(C1('subchild2'))
+        a.c1s[1].c2s.append(C2('child2 data1'))
+        a.c1s[1].c2s.append(C2('child2 data2'))
+        objectstore.commit()
+        
+class CycleTest(AssertMixin):
+    """tests two mappers with a bi-directional dependency"""
+    def setUpAll(self):
+        testbase.db.tables.clear()
+        global t1
+        global t2
+        t1 = Table('t1', testbase.db, 
+            Column('c1', Integer, primary_key=True),
+            Column('c2', Integer, ForeignKey('t2.c1'))
+        )
+        t2 = Table('t2', testbase.db,
+            Column('c1', Integer, primary_key=True),
+            Column('c2', Integer)
+        )
+        t2.create()
+        t1.create()
+        t2.c.c2.append_item(ForeignKey('t1.c1'))
+    def tearDownAll(self):
+        t2.drop()
+        t1.drop()    
+    def setUp(self):
+        objectstore.clear()
+        objectstore.LOG = True
+        clear_mappers()
+    
+    def testcycle(self):
+        class C1(object):pass
+        class C2(object):pass
+        
+        m2 = mapper(C2, t2)
+        m1 = mapper(C1, t1, properties = {
+            'c2s' : relation(m2, primaryjoin=t1.c.c2==t2.c.c1, uselist=True)
+        })
+        m2.add_property('c1s', relation(m1, primaryjoin=t2.c.c2==t1.c.c1, uselist=True))
+        a = C1()
+        b = C2()
+        c = C1()
+        d = C2()
+        e = C2()
+        f = C2()
+        a.c2s.append(b)
+        d.c1s.append(c)
+        b.c1s.append(c)
+        objectstore.commit()
+
+class CycleWDepsTest(AssertMixin):
+    """tests two mappers with a bi-directional dependency, and child objects on one of them"""
+    def setUpAll(self):
+        testbase.db.tables.clear()
+        global t1
+        global t2
+        global t3
+        t1 = Table('t1', testbase.db, 
+            Column('c1', Integer, primary_key=True),
+            Column('c2', Integer, ForeignKey('t2.c1')),
+        )
+        t2 = Table('t2', testbase.db,
+            Column('c1', Integer, primary_key=True),
+            Column('c2', Integer),
+        )
+        t2.create()
+        t1.create()
+        t2.c.c2.append_item(ForeignKey('t1.c1'))
+        t3 = Table('t1_data', testbase.db, 
+            Column('c1', Integer, primary_key=True),
+            Column('t1id', Integer, ForeignKey('t1.c1')),
+            Column('data', String(20)))
+        t3.create()
+        
+    def setUp(self):
+        objectstore.clear()
+        objectstore.LOG = True
+        clear_mappers()
+
+    def testcycle(self):
+        class C1(object):pass
+        class C2(object):pass
+        class C1Data(object):
+            def __init__(self, data=None):
+                self.data = data
+                
+        m2 = mapper(C2, t2)
+        m1 = mapper(C1, t1, properties = {
+            'c2s' : relation(m2, primaryjoin=t1.c.c2==t2.c.c1, uselist=True),
+            'data' : relation(C1Data, t3)
+        })
+        m2.add_property('c1s', relation(m1, primaryjoin=t2.c.c2==t1.c.c1, uselist=True))
+        
+        a = C1()
+        b = C2()
+        c = C1()
+        d = C2()
+        e = C2()
+        f = C2()
+        a.c2s.append(b)
+        d.c1s.append(c)
+        b.c1s.append(c)
+        a.data.append(C1Data('c1data1'))
+        a.data.append(C1Data('c1data2'))
+        c.data.append(C1Data('c1data3'))
+        objectstore.commit()
+
+        objectstore.delete(d)
+        objectstore.delete(c)
+        objectstore.commit()
+        
+if __name__ == "__main__":
+    testbase.main()        
+