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documentation/dsls/DSL:-Ash.Notifier.PubSub.cheatmd
<!--
This file was generated by Spark. Do not edit it by hand.
-->
# DSL: Ash.Notifier.PubSub
A pubsub notifier extension.
## pub_sub
A section for configuring how resource actions are published over pubsub
See the [PubSub](/documentation/topics/pub_sub.md) and [Notifiers](/documentation/topics/notifiers.md) guide for more.
### Nested DSLs
* [publish](#pub_sub-publish)
* [publish_all](#pub_sub-publish_all)
### Examples
```
pub_sub do
module MyEndpoint
prefix "post"
broadcast_type :phoenix_broadcast
publish :destroy, ["foo", :id]
publish :update, ["bar", :name] event: "name_change"
publish_all :create, "created"
end
```
### Options
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th colspan=2>Docs</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left">
<a id="pub_sub-module" href="#pub_sub-module">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
module
</span>
</a>
<sup style="color: red">*</sup>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The module to call `broadcast/3` on e.g module.broadcast(topic, event, message).
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="pub_sub-prefix" href="#pub_sub-prefix">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
prefix
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">String.t</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
A prefix for all pubsub messages, e.g `users`. A message with `created` would be published as `users:created`
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="pub_sub-broadcast_type" href="#pub_sub-broadcast_type">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
broadcast_type
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">:notification | :phoenix_broadcast | :broadcast</code>
</td>
<td style="text-align: left">
<code class="inline">:notification</code>
</td>
<td style="text-align: left" colspan=2>
What shape the event payloads will be in. See
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="pub_sub-name" href="#pub_sub-name">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
name
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
A named pub sub to pass as the first argument to broadcast.
</td>
</tr>
</tbody>
</table>
## pub_sub.publish
```elixir
publish action, topic
```
Configure a given action to publish its results over a given topic.
See the [PubSub](/documentation/topics/pub_sub.md) and [Notifiers](/documentation/topics/notifiers.md) guides for more.
### Examples
```
publish :create, "created"
```
```
publish :assign, "assigned"
```
### Options
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th colspan=2>Docs</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left">
<a id="action-topic-action" href="#action-topic-action">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
action
</span>
</a>
<sup style="color: red">*</sup>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The name of the action that should be published
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="action-topic-topic" href="#action-topic-topic">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
topic
</span>
</a>
<sup style="color: red">*</sup>
</td>
<td style="text-align: left">
<code class="inline">`any`</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The topic to publish
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="action-topic-event" href="#action-topic-event">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
event
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">String.t</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The name of the event to publish. Defaults to the action name
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="action-topic-dispatcher" href="#action-topic-dispatcher">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
dispatcher
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The module to use as a dispatcher. If none is set, the pubsub module provided is used.
</td>
</tr>
</tbody>
</table>
### Introspection
Target: `Ash.Notifier.PubSub.Publication`
## pub_sub.publish_all
```elixir
publish_all type, topic
```
Works just like `publish`, except that it takes a type
and publishes all actions of that type
See the [PubSub](/documentation/topics/pub_sub.md) and [Notifiers](/documentation/topics/notifiers.md) guides for more.
### Examples
```
publish_all :create, "created"
```
### Options
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Default</th>
<th colspan=2>Docs</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align: left">
<a id="type-topic-topic" href="#type-topic-topic">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
topic
</span>
</a>
<sup style="color: red">*</sup>
</td>
<td style="text-align: left">
<code class="inline">`any`</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The topic to publish
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="type-topic-type" href="#type-topic-type">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
type
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">:create | :update | :destroy</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
Publish on all actions of a given type
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="type-topic-action" href="#type-topic-action">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
action
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The name of the action that should be published
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="type-topic-event" href="#type-topic-event">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
event
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">String.t</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The name of the event to publish. Defaults to the action name
</td>
</tr>
<tr>
<td style="text-align: left">
<a id="type-topic-dispatcher" href="#type-topic-dispatcher">
<span style="font-family: Inconsolata, Menlo, Courier, monospace;">
dispatcher
</span>
</a>
</td>
<td style="text-align: left">
<code class="inline">atom</code>
</td>
<td style="text-align: left">
</td>
<td style="text-align: left" colspan=2>
The module to use as a dispatcher. If none is set, the pubsub module provided is used.
</td>
</tr>
</tbody>
</table>
### Introspection
Target: `Ash.Notifier.PubSub.Publication`