When customizing CONSUL, one of the most common actions is adding a new
field to a form.
This requires modifying the permitted/allowed parameters. However, in
most cases, the method returning these parameters returned an instance
of `ActionController::Parameters`, so adding more parameters to it
wasn't easy.
So customizing the code required copying the method returning those
parameters and adding the new ones. For example:
```
def something_params
params.require(:something).permit(
:one_consul_attribute,
:another_consul_attribute,
:my_custom_attribute
)
end
```
This meant that, if the `something_params` method changed in CONSUL, the
customization of this method had to be updated as well.
So we're extracting the logic returning the parameters to a method which
returns an array. Now this code can be customized without copying the
original method:
```
alias_method :consul_allowed_params, :allowed_params
def allowed_params
consul_allowed_params + [:my_custom_attribute]
end
```
We have three filters: "pending", "all" and "reviewed". Where "pending"
is the default one.
Now we are rendering the `shared/_filter_subnav` partial we need to stub
helper methods defined at the controller and the helper methods that
rely on the request parameters to test the component.
These cards will be displayed in the SDG homepage.
Note there seems to be a strange behavior in cancancan. If we define
these rules:
can :manage, Widget::Card, page_type: "SDG::Phase"
can :manage, Widget::Card
The expected behavior is the first rule will always be ignored because
the second one overwrites it. However, when creating a new card with
`load_and_authorize_resource` will automatically add `page_type:
"SDG::Phase"`.
Similarly, if we do something like:
can :manage, Widget::Card, id: 3
can :manage, Widget::Card
Then the new card will have `3` as an ID.
Maybe upgrading cancancan solves the issue; we haven't tried it. For now
we're defining a different rule when creating widget cards.
Note using `params[:relatable_type].classify` is recognized as a
security risk by some tools. However, it's a false positive, since we've
added constraints to the URL so that paramenter can only have the values
we trust.
