Update readme example to be valid

Author: brianc

README.md

@@ -61,17 +61,17 @@ var friendship = sql.define({
 
 var friends = user.as('friends');
 var userToFriends = user
-  .leftJoin(friendship.on(user.id.equals(friendship.userId)))
-  .leftJoin(friends.on(friendship.friendId.equals(friends.id)));
+  .leftJoin(friendship).on(user.id.equals(friendship.userId))
+  .leftJoin(friends).on(friendship.friendId.equals(friends.id));
 
 //and now...compose...
-var friendsWhoHaveLoggedInQuery = userToFriends.where(friends.lastLogin.notNull());
+var friendsWhoHaveLoggedInQuery = user.from(userToFriends).where(friends.lastLogin.notNull());
 //SELECT * FROM "user" 
 //LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId") 
 //LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")
 //WHERE "friends"."lastLogin" IS NOT NULL
 
-var friendsWhoUseGmailQuery = userToFriends.where(friends.email.like('%@gmail.com'));
+var friendsWhoUseGmailQuery = user.from(userToFriends).where(friends.email.like('%@gmail.com'));
 //SELECT * FROM "user" 
 //LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId") 
 //LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")

test/readme-examples.js

@@ -0,0 +1,32 @@
+var sql = require('../lib');
+var user = sql.define({
+  name: 'user',
+  columns: ['id', 'lastLogin', 'email']
+});
+
+//this also makes parts of your queries composable, which is handy
+
+var friendship = sql.define({
+  name: 'friendship',
+  columns: ['userId', 'friendId']
+});
+
+var friends = user.as('friends');
+var userToFriends = user
+  .leftJoin(friendship).on(user.id.equals(friendship.userId))
+  .leftJoin(friends).on(friendship.friendId.equals(friends.id));
+  
+//and now...compose...
+var friendsWhoHaveLoggedInQuery = user.from(userToFriends).where(friends.lastLogin.isNotNull());
+console.log(friendsWhoHaveLoggedInQuery.toQuery().text);
+//SELECT * FROM "user" 
+//LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId") 
+//LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")
+//WHERE "friends"."lastLogin" IS NOT NULL
+
+var friendsWhoUseGmailQuery = user.from(userToFriends).where(friends.email.like('%@gmail.com'));
+console.log(friendsWhoUseGmailQuery.toQuery().text);
+//SELECT * FROM "user" 
+//LEFT JOIN "friendship" ON ("user"."id" = "friendship"."userId") 
+//LEFT JOIN "user" AS "friends" ON ("friendship"."friendId" = "friends"."id")
+//WHERE "friends"."email" LIKE %1