能否配置phoenix_swagger使其解析视图模块中的Schema定义？

Absolutely! You absolutely can configure PhoenixSwagger to parse schema definitions from your view modules instead of controllers—and this approach actually makes a lot of sense, since views are already responsible for shaping how your data is presented to clients. Here's how to pull it off:

Step 1: Define Swagger Schemas in Your View Modules #

First, move your swagger_definitions/0 function from the controller into the corresponding view. This keeps your schema logic tied directly to the module that handles data formatting, which aligns with separation of concerns.

Example in a view module:

defmodule MyApp.UserView do
  use MyApp.Web, :view

  def swagger_definitions do
    %{
      User: PhoenixSwagger.Schema.schema do
        title "User"
        description "A registered application user"
        property :id, :integer, "Unique user identifier", required: true
        property :email, :string, "User's email address", format: "email", required: true
        property :display_name, :string, "User's public display name"
        property :inserted_at, :string, "Account creation timestamp", format: "date-time"
      end,
      UserList: PhoenixSwagger.Schema.schema do
        title "User List"
        description "Collection of application users"
        property :data, PhoenixSwagger.Schema.array(:User), "List of users"
      end
    }
  end
end

Step 2: Update PhoenixSwagger Config to Include View Modules #

Next, tell PhoenixSwagger to scan your view modules for schema definitions. Open your config/config.exs file and add the definitions_modules key to your PhoenixSwagger configuration, listing all view modules that contain swagger_definitions/0 functions.

Example config:

config :my_app, :phoenix_swagger,
  swagger_files: %{
    "priv/static/swagger.json" => [
      router: MyApp.Router,
      endpoint: MyAppWeb.Endpoint,
      # Add all your view modules here
      definitions_modules: [MyApp.UserView, MyApp.PostView, MyApp.CommentView]
    ]
  }

Step 3: Reference View Schemas in Controller Swagger Paths #

Now you can reference the schemas from your views directly in your controller's swagger_path definitions, just like you would if they were defined in the controller.

Example in a controller:

defmodule MyApp.UserController do
  use MyApp.Web, :controller
  use PhoenixSwagger

  swagger_path :index do
    get "/api/users"
    summary "Get all users"
    response 200, "Success", Schema.ref(:UserList) # References schema from UserView
  end

  swagger_path :show do
    get "/api/users/{id}"
    summary "Get a single user"
    parameters do
      id :path, :integer, "User ID", required: true
    end
    response 200, "Success", Schema.ref(:User) # References schema from UserView
  end

  # Rest of controller logic...
end

Why This Approach Works Better #

• Separation of concerns: Views handle data presentation logic, so keeping schemas here keeps related code grouped together.
• Easier maintenance: If you update how your view formats data (e.g., add a new field), you can update the schema in the same module instead of jumping between controllers and views.
• Reusability: Schemas defined in views can be referenced across multiple controllers without duplicating code.

Quick Notes #

• Make sure every view module with swagger_definitions/0 is added to the definitions_modules list in your config—otherwise PhoenixSwagger won't pick up those schemas.
• Ensure schema keys (like :User or :UserList) are unique across all modules to avoid naming conflicts.

内容的提问来源于stack exchange，提问作者Ooba Elda