ActiveRecord::Base::Normalization we can specify unique normalization rules for model attributes. When an attribute is assigned or changed, normalization is applied, and the normalised value is stored in the database.
To enable records to be queried using unnormalized values, the normalization is also done to the matching keyword argument of query methods. These rules are applied during data assignment and updates, ensuring that data is stored in a consistent and standardized format in the database.
Before Rails 7.1, we could normalize attributes using
With our own custom normalization, we cannot make queries using finder methods using unnormalized values.
Thanks to this PR, in the above code, The
normalizes method is used to define an attribute normalization rule for
:name attribute of the
User model, it strips leading,
and trailing spaces and converts the name to titlecase.
By default, Normalization will not be applied to
nil values. To normalize
nil value, we can enable it using
We can apply the normalization rule manually using the class method
Normalization is by default applied to the finder method. This allows a record to be created
and later queried using unnormalized values but it won’t work with SQL fragments. Since SQL does not automatically apply the normalization rules defined in our model, it searches for an exact match.
Normalization is not automatically applied when fetching data from the database to prevent unintended alterations to pre-existing records. To apply normalization to pre-existing data, we can either assign a new value to the attribute or explicitly migrate it using the