[id="defining-workflow-conditions_{context}"]

[[_workflow_conditions_]]
= Defining conditions

The optional `if` setting allows you to define the conditions, as expressions, that the target resource must meet in
order for the workflow to be triggered. See <<_workflow_expression_language_>> for more details.

Conditions provide fine-grained control over whether a workflow execution should be created.
They allow you to inspect the context of the event and the state of the resource.
For example, you can create conditions to check:
* If a user has a specific attribute.
* If a specific role is granted to a user or if the user is joining a specific group.

If the condition evaluates to `true`, the workflow execution is created. If it evaluates to `false`, no workflow execution is created, even though
the expression from the `on` setting evaluates to `true`.

Just like the `on` setting, the condition is written using an expression that supports a variety of checks on the realm resource associated with the event.
For instance, considering a `user_created` event, you can define a condition to trigger the workflow only if the user has a specific attribute:

```yaml
on: user-created
if: has-user-attribute(plan=gold)
```

In this example, the workflow will only be triggered when a new user is created and that user has an attribute `plan` with the value `gold`.

{project_name} provides a set of built-in conditions that you can use in your workflows.
The conditions are also based on the realm resource associated with the event.

[[_workflow_user_functions_]]
== User functions

[cols="3*", options="header"]
|===
|Condition
|Description
|Parameters
| `has-user-attribute` | If the user has an attribute set. | The attribute name and optionally the attribute value using a properties format. If multiple values, they should be separated by comma. If the value is omitted, only the presence of the attribute is checked.
| `has-role` | If the user is granted with a specific role | The name of the role.
| `has-identity-provider-link` | If the user is linked to an identity provider. | The alias of the identity provider.
| `is-member-of` | If the user is member of a specific group. | The name or path of the group.
|===
