Fix wrong SQLA polymorphic

gistfile1.diff

+@manager.command
+def fix_credits():
+    from simplecoin.models import CreditExchange
+    credit_table = Credit.__table__
+    credit_exc_table = CreditExchange.__table__
+    for credit in Credit.query.options(db.joinedload('block')).order_by(Credit.id):
+        correct = 1
+        if credit.block and credit.block.currency == credit.currency:
+            correct = 0
+
+        print "{} {} {} {}".format(str(credit.id).zfill(4), credit.currency,
+                                   credit.block.currency, credit.type)
+
+        id = credit.id
+        if credit.type != correct and correct == 0:
+            print "\tCreditExchange => Credit".format(credit.id)
+            a = credit_exc_table.delete().where(credit_exc_table.c.id == id)
+            b = credit_table.update().where(credit_table.c.id == id).values(type=0)
+            db.session.execute(a)
+            db.session.execute(b)
+        elif credit.type != correct and correct == 1:
+            print "\tCredit => CreditExchange".format(id)
+            a = credit_exc_table.insert().values(id=id)
+            b = credit_table.update().where(credit_table.c.id == id).values(type=1)
+            db.session.execute(a)
+            db.session.execute(b)
+        else:
+            print "\tCorrect!".format(credit.id)
+            pass
+
+    db.session.commit()
+
+