strapi/docs/3.0.0-beta.x/plugin-development/backend-development.md
Alexandre Bodin fe5edf52bb Update policy documentations and add migration guide
Signed-off-by: Alexandre Bodin <bodin.alex@gmail.com>
2020-02-26 13:39:05 +01:00

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# Back-end Development
This section explains how the 'back-end part' of your plugin works.
## Routes
The plugin API routes are defined in the `./plugins/**/config/routes.json` file.
::: tip
Please refer to [router documentation](../concepts/routing.md) for information.
:::
**Route prefix**
Each route of a plugin is prefixed by the name of the plugin (eg: `/my-plugin/my-plugin-route`).
To disable the prefix, add the `prefix` attribute to each concerned route, like below:
```json
{
"method": "GET",
"path": "/my-plugin-route",
"handler": "MyPlugin.action",
"config": {
"policies": [],
"prefix": false
}
}
```
## CLI
The CLI can be used to generate files in the plugins folders.
Please refer to the [CLI documentation](../cli/CLI.md) for more information.
## Controllers
Controllers contain functions executed according to the requested route.
Please refer to the [Controllers documentation](../concepts/controllers.md) for more information.
## Models
A plugin can have its own models.
### Table/Collection naming
Sometimes it happens that the plugins inject models that have the same name as yours. Let's take a quick example.
You already have `User` model defining in your `./api/user/models/User.settings.json` API. And you decide to install the `Users & Permissions` plugin. This plugin also contains a `User` model. To avoid the conflicts, the plugins' models are not globally exposed which means you cannot access to the plugin's model like this:
```js
module.exports = {
findUser: async function(params) {
// This `User` global variable will always make a reference the User model defining in your `./api/xxx/models/User.settings.json`.
return await User.find();
},
};
```
Also, the table/collection name won't be `users` because you already have a `User` model. That's why, the framework will automatically prefix the table/collection name for this model with the name of the plugin. Which means in our example, the table/collection name of the `User` model of our plugin `Users & Permissions` will be `users-permissions_users`. If you want to force the table/collection name of the plugin's model, you can add the `collectionName` attribute in your model.
Please refer to the [Models documentation](../concepts/models.md) for more information.
## Policies
### Global policies
A plugin can also use a globally exposed policy in the current Strapi project.
```json
{
"routes": [
{
"method": "GET",
"path": "/",
"handler": "MyPlugin.index",
"config": {
"policies": ["global::isAuthenticated"]
}
}
]
}
```
### Plugin policies
A plugin can have its own policies, such as adding security rules. For instance, if the plugin includes a policy named `isAuthenticated`, the syntax to use this policy would be:
```json
{
"routes": [
{
"method": "GET",
"path": "/",
"handler": "MyPlugin.index",
"config": {
"policies": ["plugins::myplugin.isAuthenticated"]
}
}
]
}
```
Please refer to the [Policies documentation](../concepts/policies.md) for more information.