Changes between Initial Version and Version 1 of MultipleDatabaseSupport

Timestamp:

Jun 8, 2006, 1:58:54 PM (18 years ago)

Author:

jpellerin@…

Comment:

First notes on multiple database support

MultipleDatabaseSupport

@@ +1 @@
+== Multiple Database Support ==
+
+Work is underway on a patch for #1142, which will add support for multiple database connections. This page documents my current plan and progress towards a fully working patch.
+
+=== The plan ===
+
+ * Add a new settings variable, DATABASES. DATABASES is a dict of named database connection parameter sets. In each set, the keys are the same as the standard database connection settings variables.
+{{{
+#!python
+DATABASES = { 
+    'a': { 'DATABASE_ENGINE': 'sqlite3',
+           'DATABASE_NAME': '/tmp/dba.db'
+    },
+    'b': { 'DATABASE_ENGINE': 'sqlite3',
+           'DATABASE_NAME': '/tmp/dbb.db'
+    }}
+}}}   
+
+  
+
+ * Add db_connection to Meta. This allows model classes to specify which connection they should use.
+{{{
+#!python
+class Artist(models.Model):
+    name = models.CharField(maxlength=100)
+    alive = models.BooleanField(default=True)
+
+    def __str__(self):
+        return self.name
+
+    class Meta:
+        db_connection = 'a'
+        
+class Widget(models.Model):
+    code = models.CharField(maxlength=10, unique=True)
+    weight = models.IntegerField()
+
+    def __str__(self):
+        return self.code
+    
+    class Meta:
+        db_connection = 'b'
+}}}