> For the complete documentation index, see [llms.txt](https://docs.blog-api.codewithsadee.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blog-api.codewithsadee.com/references/comments.md).

# Comments

Comment management

## Get Comments by Blog

> Retrieves all comments associated with a specific blog post.

```json
{"openapi":"3.0.3","info":{"title":"Blog API","version":"1.0.0"},"tags":[{"name":"Comments","description":"Comment management"}],"servers":[{"url":"https://blog-api.codewithsadee.com/api/v1","description":"API v1 Base Path"}],"security":[{"bearerAuth":[]}],"components":{"securitySchemes":{"bearerAuth":{"type":"http","scheme":"bearer","bearerFormat":"JWT","description":"JWT Access Token obtained via login/register/refresh"}},"parameters":{"BlogIdParam":{"in":"path","name":"blogId","schema":{"type":"string","format":"objectid"},"required":true,"description":"ID of the blog post."}},"schemas":{"Comment":{"type":"object","properties":{"_id":{"type":"string","format":"objectid","readOnly":true},"blogId":{"type":"string","format":"objectid","description":"ID of the associated blog post"},"userId":{"type":"string","format":"objectid","description":"ID of the user who commented","readOnly":true},"content":{"type":"string","maxLength":1000,"description":"The comment text"},"likesCount":{"type":"integer","default":0,"readOnly":true},"createdAt":{"type":"string","format":"date-time","readOnly":true},"updatedAt":{"type":"string","format":"date-time","readOnly":true}},"required":["blogId","userId","content"]},"ErrorResponse":{"type":"object","properties":{"code":{"type":"string","description":"Application-specific error code"},"message":{"type":"string","description":"Human-readable error message"}},"required":["code","message"]}},"responses":{"Unauthorized":{"description":"Authentication information is missing or invalid (e.g., missing/expired token).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"NotFound":{"description":"The specified resource was not found.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"ServerError":{"description":"An unexpected error occurred on the server.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}}}},"paths":{"/comments/blog/{blogId}":{"get":{"tags":["Comments"],"summary":"Get Comments by Blog","description":"Retrieves all comments associated with a specific blog post.","operationId":"getCommentsByBlog","parameters":[{"$ref":"#/components/parameters/BlogIdParam"}],"responses":{"200":{"description":"A list of comments for the blog.","content":{"application/json":{"schema":{"type":"object","properties":{"comments":{"type":"array","items":{"$ref":"#/components/schemas/Comment"}}}}}}},"401":{"$ref":"#/components/responses/Unauthorized"},"404":{"$ref":"#/components/responses/NotFound"},"500":{"$ref":"#/components/responses/ServerError"}}}}}}
```

## Create Comment

> Adds a new comment to a specific blog post. Increments comments count.

```json
{"openapi":"3.0.3","info":{"title":"Blog API","version":"1.0.0"},"tags":[{"name":"Comments","description":"Comment management"}],"servers":[{"url":"https://blog-api.codewithsadee.com/api/v1","description":"API v1 Base Path"}],"security":[{"bearerAuth":[]}],"components":{"securitySchemes":{"bearerAuth":{"type":"http","scheme":"bearer","bearerFormat":"JWT","description":"JWT Access Token obtained via login/register/refresh"}},"parameters":{"BlogIdParam":{"in":"path","name":"blogId","schema":{"type":"string","format":"objectid"},"required":true,"description":"ID of the blog post."}},"schemas":{"CommentInput":{"type":"object","properties":{"content":{"type":"string","maxLength":1000,"description":"The comment text"}},"required":["content"]},"Comment":{"type":"object","properties":{"_id":{"type":"string","format":"objectid","readOnly":true},"blogId":{"type":"string","format":"objectid","description":"ID of the associated blog post"},"userId":{"type":"string","format":"objectid","description":"ID of the user who commented","readOnly":true},"content":{"type":"string","maxLength":1000,"description":"The comment text"},"likesCount":{"type":"integer","default":0,"readOnly":true},"createdAt":{"type":"string","format":"date-time","readOnly":true},"updatedAt":{"type":"string","format":"date-time","readOnly":true}},"required":["blogId","userId","content"]},"ValidationErrorResponse":{"type":"object","properties":{"code":{"type":"string","enum":["ValidationError"]},"errors":{"type":"object","additionalProperties":{"$ref":"#/components/schemas/ValidationErrorDetail"}}},"required":["code","errors"]},"ValidationErrorDetail":{"type":"object","properties":{"type":{"type":"string"},"value":{"type":"string"},"msg":{"type":"string"},"path":{"type":"string"},"location":{"type":"string"}}},"ErrorResponse":{"type":"object","properties":{"code":{"type":"string","description":"Application-specific error code"},"message":{"type":"string","description":"Human-readable error message"}},"required":["code","message"]}},"responses":{"BadRequestValidation":{"description":"Invalid input data provided. See errors object for details.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ValidationErrorResponse"}}}},"Unauthorized":{"description":"Authentication information is missing or invalid (e.g., missing/expired token).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"NotFound":{"description":"The specified resource was not found.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"ServerError":{"description":"An unexpected error occurred on the server.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}}}},"paths":{"/comments/blog/{blogId}":{"post":{"tags":["Comments"],"summary":"Create Comment","description":"Adds a new comment to a specific blog post. Increments comments count.","operationId":"createComment","parameters":[{"$ref":"#/components/parameters/BlogIdParam"}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"$ref":"#/components/schemas/CommentInput"}}}},"responses":{"201":{"description":"Comment created successfully.","content":{"application/json":{"schema":{"type":"object","properties":{"comment":{"$ref":"#/components/schemas/Comment"}}}}}},"400":{"$ref":"#/components/responses/BadRequestValidation"},"401":{"$ref":"#/components/responses/Unauthorized"},"404":{"$ref":"#/components/responses/NotFound"},"500":{"$ref":"#/components/responses/ServerError"}}}}}}
```

## Delete Comment

> Deletes a specific comment. Requires user to be author or admin. Decrements comments count.

```json
{"openapi":"3.0.3","info":{"title":"Blog API","version":"1.0.0"},"tags":[{"name":"Comments","description":"Comment management"}],"servers":[{"url":"https://blog-api.codewithsadee.com/api/v1","description":"API v1 Base Path"}],"security":[{"bearerAuth":[]}],"components":{"securitySchemes":{"bearerAuth":{"type":"http","scheme":"bearer","bearerFormat":"JWT","description":"JWT Access Token obtained via login/register/refresh"}},"parameters":{"CommentIdParam":{"in":"path","name":"commentId","schema":{"type":"string","format":"objectid"},"required":true,"description":"ID of the comment."}},"responses":{"NoContent":{"description":"Request successful, no response body."},"Unauthorized":{"description":"Authentication information is missing or invalid (e.g., missing/expired token).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"Forbidden":{"description":"Access denied due to insufficient permissions.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"NotFound":{"description":"The specified resource was not found.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}},"ServerError":{"description":"An unexpected error occurred on the server.","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}}},"schemas":{"ErrorResponse":{"type":"object","properties":{"code":{"type":"string","description":"Application-specific error code"},"message":{"type":"string","description":"Human-readable error message"}},"required":["code","message"]}}},"paths":{"/comments/{commentId}":{"delete":{"tags":["Comments"],"summary":"Delete Comment","description":"Deletes a specific comment. Requires user to be author or admin. Decrements comments count.","operationId":"deleteComment","parameters":[{"$ref":"#/components/parameters/CommentIdParam"}],"responses":{"204":{"$ref":"#/components/responses/NoContent"},"401":{"$ref":"#/components/responses/Unauthorized"},"403":{"$ref":"#/components/responses/Forbidden"},"404":{"$ref":"#/components/responses/NotFound"},"500":{"$ref":"#/components/responses/ServerError"}}}}}}
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.blog-api.codewithsadee.com/references/comments.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.