Updated getQuestionById service and added docs for it in Swagger (#663)

Co-authored-by: Анна-Марія <[email protected]>

docs/questions/question.yaml

@@ -142,6 +142,82 @@ paths:
                 code: FORBIDDEN
                 message: You do not have permission to perform this action.
   /questions/{id}:
+    get:
+      security:
+        - cookieAuth: []
+      tags:
+        - Questions
+      summary: Find and return question by ID
+      description: Finds and returns a question with the specified ID.
+      produces:
+        - application/json
+      parameters:
+        - name: id
+          in: path
+          required: true
+          description: ID of the question that needs to be fetched
+          type: string
+      responses:
+        200:
+          description: OK
+          content:
+            application/json:
+              schema:
+                $ref: '#definitions/question'
+              example:
+                _id: 63ec1cd51e9d781cdb6f4b14
+                title: WebAssembly
+                text: What is the chemical symbol for water?
+                answers:
+                  - text: First answer
+                    isCorrect: true
+                  - text: Second answer
+                    isCorrect: false
+                type: multipleChoice
+                category: 6477007a6fa4d05e1a800ce1
+                author: 63da8767c9ad4c9a0b0eacd3
+                createdAt: 2023-02-14T23:44:21.334Z
+                updatedAt: 2023-02-14T23:44:21.334Z
+        400:
+          description: Bad Request
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/Error'
+              example:
+                status: 400
+                code: INVALID_ID
+                message: ID is invalid.
+        401:
+          description: Unauthorized
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/Error'
+              example:
+                status: 401
+                code: UNAUTHORIZED
+                message: The requested URL requires user authorization.
+        403:
+          description: Forbidden
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/Error'
+              example:
+                status: 403
+                code: FORBIDDEN
+                message: You do not have permission to perform this action.
+        404:
+          description: Not Found
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/Error'
+              example:
+                status: 404
+                code: DOCUMENT_NOT_FOUND
+                message: Question with the specified id was not found.
     patch:
       security:
         - cookieAuth: []

services/question.js

@@ -17,7 +17,7 @@ const questionService = {
   },
 
   getQuestionById: async (id) => {
-    return await Question.findById(id).populate({ path: 'category', select: 'name' }).lean().exec()
+    return await Question.findById(id).lean().exec()
   },
 
   createQuestion: async (author, data) => {