Add OpenAPI documentation for keyword API responses

src/controllers/keyword.rs

@@ -4,9 +4,8 @@ use crate::controllers::helpers::{Paginate, pagination::Paginated};
 use crate::models::Keyword;
 use crate::util::errors::AppResult;
 use crate::views::EncodableKeyword;
+use axum::Json;
 use axum::extract::{FromRequestParts, Path, Query};
-use axum_extra::json;
-use axum_extra::response::ErasedJson;
 use diesel::prelude::*;
 use http::request::Parts;
 
@@ -22,19 +21,35 @@ pub struct ListQueryParams {
     sort: Option<String>,
 }
 
+#[derive(Debug, Serialize, utoipa::ToSchema)]
+pub struct ListResponse {
+    /// The list of keywords.
+    pub keywords: Vec<EncodableKeyword>,
+
+    #[schema(inline)]
+    pub meta: ListMeta,
+}
+
+#[derive(Debug, Serialize, utoipa::ToSchema)]
+pub struct ListMeta {
+    /// The total number of keywords.
+    #[schema(example = 123)]
+    pub total: i64,
+}
+
 /// List all keywords.
 #[utoipa::path(
     get,
     path = "/api/v1/keywords",
     params(ListQueryParams, PaginationQueryParams),
     tag = "keywords",
-    responses((status = 200, description = "Successful Response")),
+    responses((status = 200, description = "Successful Response", body = inline(ListResponse))),
 )]
 pub async fn list_keywords(
     state: AppState,
     params: ListQueryParams,
     req: Parts,
-) -> AppResult<ErasedJson> {
+) -> AppResult<Json<ListResponse>> {
     use crate::schema::keywords;
 
     let mut query = keywords::table.into_boxed();
@@ -49,15 +64,15 @@ pub async fn list_keywords(
     let mut conn = state.db_read().await?;
     let data: Paginated<Keyword> = query.load(&mut conn).await?;
     let total = data.total();
-    let kws = data
-        .into_iter()
-        .map(Keyword::into)
-        .collect::<Vec<EncodableKeyword>>();
+    let keywords = data.into_iter().map(Keyword::into).collect();
 
-    Ok(json!({
-        "keywords": kws,
-        "meta": { "total": total },
-    }))
+    let meta = ListMeta { total };
+    Ok(Json(ListResponse { keywords, meta }))
+}
+
+#[derive(Debug, Serialize, utoipa::ToSchema)]
+pub struct GetResponse {
+    pub keyword: EncodableKeyword,
 }
 
 /// Get keyword metadata.
@@ -68,11 +83,14 @@ pub async fn list_keywords(
         ("keyword" = String, Path, description = "The keyword to find"),
     ),
     tag = "keywords",
-    responses((status = 200, description = "Successful Response")),
+    responses((status = 200, description = "Successful Response", body = inline(GetResponse))),
 )]
-pub async fn find_keyword(Path(name): Path<String>, state: AppState) -> AppResult<ErasedJson> {
+pub async fn find_keyword(
+    Path(name): Path<String>,
+    state: AppState,
+) -> AppResult<Json<GetResponse>> {
     let mut conn = state.db_read().await?;
     let kw = Keyword::find_by_keyword(&mut conn, &name).await?;
-
-    Ok(json!({ "keyword": EncodableKeyword::from(kw) }))
+    let keyword = EncodableKeyword::from(kw);
+    Ok(Json(GetResponse { keyword }))
 }

src/openapi.rs

@@ -40,6 +40,11 @@ other clients).
         license(name = "MIT OR Apache-2.0", url = "https://github.com/rust-lang/crates.io/blob/main/README.md#%EF%B8%8F-license"),
         version = "0.0.0",
     ),
+    components(
+        schemas(
+            crate::views::EncodableKeyword,
+        ),
+    ),
     modifiers(&SecurityAddon),
     servers(
         (url = "https://crates.io"),

src/snapshots/crates_io__openapi__tests__openapi_snapshot.snap

@@ -4,6 +4,41 @@ expression: response.json()
 ---
 {
   "components": {
+    "schemas": {
+      "Keyword": {
+        "properties": {
+          "crates_cnt": {
+            "description": "The total number of crates that have this keyword.",
+            "example": 42,
+            "format": "int32",
+            "type": "integer"
+          },
+          "created_at": {
+            "description": "The date and time this keyword was created.",
+            "example": "2017-01-06T14:23:11Z",
+            "format": "date-time",
+            "type": "string"
+          },
+          "id": {
+            "description": "An opaque identifier for the keyword.",
+            "example": "http",
+            "type": "string"
+          },
+          "keyword": {
+            "description": "The keyword itself.",
+            "example": "http",
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "keyword",
+          "created_at",
+          "crates_cnt"
+        ],
+        "type": "object"
+      }
+    },
     "securitySchemes": {
       "api_token": {
         "description": "The API token is used to authenticate requests from cargo and other clients.",
@@ -1331,6 +1366,40 @@ expression: response.json()
         ],
         "responses": {
           "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "properties": {
+                    "keywords": {
+                      "description": "The list of keywords.",
+                      "items": {
+                        "$ref": "#/components/schemas/Keyword"
+                      },
+                      "type": "array"
+                    },
+                    "meta": {
+                      "properties": {
+                        "total": {
+                          "description": "The total number of keywords.",
+                          "example": 123,
+                          "format": "int64",
+                          "type": "integer"
+                        }
+                      },
+                      "required": [
+                        "total"
+                      ],
+                      "type": "object"
+                    }
+                  },
+                  "required": [
+                    "keywords",
+                    "meta"
+                  ],
+                  "type": "object"
+                }
+              }
+            },
             "description": "Successful Response"
           }
         },
@@ -1356,6 +1425,21 @@ expression: response.json()
         ],
         "responses": {
           "200": {
+            "content": {
+              "application/json": {
+                "schema": {
+                  "properties": {
+                    "keyword": {
+                      "$ref": "#/components/schemas/Keyword"
+                    }
+                  },
+                  "required": [
+                    "keyword"
+                  ],
+                  "type": "object"
+                }
+              }
+            },
             "description": "Successful Response"
           }
         },

src/views.rs

@@ -158,11 +158,23 @@ impl From<VersionDownload> for EncodableVersionDownload {
     }
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, utoipa::ToSchema)]
+#[schema(as = Keyword)]
 pub struct EncodableKeyword {
+    /// An opaque identifier for the keyword.
+    #[schema(example = "http")]
     pub id: String,
+
+    /// The keyword itself.
+    #[schema(example = "http")]
     pub keyword: String,
+
+    /// The date and time this keyword was created.
+    #[schema(example = "2017-01-06T14:23:11Z")]
     pub created_at: DateTime<Utc>,
+
+    /// The total number of crates that have this keyword.
+    #[schema(example = 42)]
     pub crates_cnt: i32,
 }