Contents

# Policy Lookup

Action Policy tries to automatically infer policy class from the target using the following _probes_:

1. If the target is a `Symbol`, then use `"#{target.to_s.classify}Policy"` as a `policy_name` (see below);
2. If the target responds to `policy_class`, then use it;
3. If the target's class responds to `policy_class`, then use it;
4. If the target or the target's class responds to `policy_name`, then use it (the `policy_name` should end with `Policy` as it's not appended automatically);
5. Otherwise, use `#{target.class.name}Policy`.

> \* [Namespaces](namespaces.md) could be also be considered when `namespace` option is set.

You can call `ActionPolicy.lookup(record, options)` to infer policy class for the record.

When no policy class is found, an `ActionPolicy::NotFound` error is raised.

You can [customize lookup](custom_lookup_chain.md) logic if necessary.

Version data entries

10 entries across 10 versions & 1 rubygems

Version	Path
action_policy-0.4.3	docs/lookup_chain.md
action_policy-0.4.2	docs/lookup_chain.md
action_policy-0.4.1	docs/lookup_chain.md
action_policy-0.4.0	docs/lookup_chain.md
action_policy-0.3.4	docs/lookup_chain.md
action_policy-0.3.3	docs/lookup_chain.md
action_policy-0.3.2	docs/lookup_chain.md
action_policy-0.3.1	docs/lookup_chain.md
action_policy-0.3.0	docs/lookup_chain.md
action_policy-0.3.0.beta1	docs/lookup_chain.md