This tutorial shows you how to safely remove records between relationships.
When one needs to select a record in a table that do not have related records through a relation, it is generally suggested to use a subquery. Personnaly, I prefer a high level approach, and I have a method to do it with scopes.
I could make this work following same useful tips from this post.
I keep a reference to some simple but painful task if you forget a common or something. I am new to Yii and this took awhile for me to figure out. Everything I read said do this or do that and not a single one worked for me. However, the following did.
Sometimes the right place to store application data is in a join table. For example, movie viewers either like or don’t like the movies they watched.
Lets say we have two models and relation between them:
There are situations in which Active Record will generate nonsense queries from what a nieve Yii user might think is reasonable code. One such situation is a
CDbCriteria to get data from parent and 1:n child table with a condition on the child table.
It's very common to see new Yii users confusing the relations
BELONGS_TO, and getting it wrong means you won't get proper values back. And though we'll talk about
HAS_MANY as well, we're specifically omitting the
MANY_MANY relation because it's a whole different animal.