reasonably working calibreweb thing

CalibreWebCompanion/db_routers/__init__.py

@@ -0,0 +1,2 @@
+from .routers import DjangoRouter, CalibreRouter
+__name__ = "db_routers"

CalibreWebCompanion/db_routers/routers.py

@@ -0,0 +1,76 @@
+
+
+class DjangoRouter:
+    """
+    A router to control all database operations on models in the
+    auth and contenttypes applications.
+    """
+    route_app_labels = {'auth', 'contenttypes', "sessions", "sites", "admin", "flatpages"}
+
+    def db_for_read(self, model, **hints):
+        """
+        Attempts to read auth and contenttypes models go to default.
+        """
+        if model._meta.app_label in self.route_app_labels:
+            return 'default'
+        return None
+
+    def db_for_write(self, model, **hints):
+        """
+        Attempts to write auth and contenttypes models go to django.
+        """
+        if model._meta.app_label in self.route_app_labels:
+            return 'default'
+        return None
+
+    def allow_relation(self, obj1, obj2, **hints):
+        """
+        Allow relations if a model in the auth or contenttypes apps is
+        involved.
+        """
+        if (
+            obj1._meta.app_label in self.route_app_labels or
+            obj2._meta.app_label in self.route_app_labels
+        ):
+           return True
+        return None
+
+    def allow_migrate(self, db, app_label, model_name=None, **hints):
+        """
+        Make sure the auth and contenttypes apps only appear in the
+        'django' database.
+        """
+        if app_label in self.route_app_labels:
+            return db == 'default'
+        return None
+
+
+
+class CalibreRouter:
+    """
+    A router to control all database operations on models in the
+    auth and contenttypes applications.
+    """
+    def db_for_read(self, model, **hints):
+        """
+        Attempts to read anything else goes to calibre
+        """
+        return 'calibre'
+
+    # def db_for_write(self, model, **hints): # might be prudent not to allow writes
+    #     """
+    #     Attempts to write auth and contenttypes models go to 'calibre'.
+    #     """
+    #     return 'calibre'
+
+    def allow_relation(self, obj1, obj2, **hints):
+        """
+        Allow relations.
+        """
+        return True
+
+    # def allow_migrate(self, db, app_label, model_name=None, **hints): # might be prudent not to allow migrations
+    #     """
+    #     Yes
+    #     """
+    #     return True