# 内容操作 ### 获取内容详情 `Content article = Contents.content(contentId)` **参数说明** | 参数名 | 类型 | 必填 | 说明 | | --------- | ------ | -- | ----- | | contentId | String | 是 | 内容 ID | **返回参数** | 参数 | 类型 | 说明 | | ------------------- | ------------ | ------- | | Content.CATEGORIES | Number Array | 内容分类 | | Content.CONTENT | String | 内容详情 | | Content.COVER | String | 封面图 url | | Content.CREATED\_AT | Number | 创建时间 | | Content.CREATED\_BY | Number | user ID | | Content.DESCRIPTION | String | 摘要 | | Content.GROUP\_ID | Number | 内容库 ID | | Content.ID | Number | 内容 ID | | Content.TITLE | String | 内容标题 | | Content.UPDATE\_AT | Number | 更新时间 | > **info** 如果有自定义字段，则一并返回。 **请求示例** ```java Content article = Contents.content("1514529306082815"); ``` **返回示例** ```json { categories: [1513076252710475], content: "

\b 该片讲述了伊娅不满父亲的恶作剧

", cover: "https://cloud-minapp-1131.cloud.ifanrusercontent.com/1donykIpnuvcRiAX.jpg", created_at: 1513076305, created_by: 16042162, description: "iphoneX 发布", group_id: 1513076211190694, id: 1513076305938456, title: "iphone X", updated_at: 1513076364 } ``` ### 查询，获取内容列表 内容查询与[数据表查询](/baas-js-sdk/android-sdk/schema/query.md)方法一致。 **请求示例** ```java // 查找内容库 groupId 下的所有内容 Query query = new Query(); query.put(Content.QUERY_CONTENT_GROUP_ID, "groupId"); PagedList contents = Contents.contents(query); // 查找该内容库下在指定分类下的内容 Query query = new Query(); query.put(Content.QUERY_CONTENT_GROUP_ID, "groupId"); Where where = new Where(); where.containedIn(Content.CATEGORIES, Arrays.asList("1513076252710475")); PagedList contents = Contents.contents(query); ``` #### 筛选字段 select 使用方法可以参考[数据表 - 字段过滤](/baas-js-sdk/android-sdk/schema/select-and-expand.md)小节 #### 扩展字段 expand 使用方法可以参考[数据表 - 字段扩展](/baas-js-sdk/android-sdk/schema/select-and-expand.md)小节 假设 \_richtextcontent 表中有一个类型为 pointer 的字段，名称为 `pointer_test_oder`, 指向了 test\_order 表 **请求示例 1** ```java Where where = new Where(); where.equalTo(Content.ID, "1513076305938456"); Query query = new Query() .select("-title", "-content") .expand("pointer_test_oder") .put(where); Content content = Contents.contents(query).getObjects().get(0); ``` **请求结果 1** ```json { "categories": [ 1513076252710475 ], "cover": "https://cloud-minapp-1131.cloud.ifanrusercontent.com/1donykIpnuvcRiAX.jpg", "created_at": 1513076305, "created_by": 16042162, "description": "iphoneX 发布", "group_id": 1513076211190694, "id": 1513076305938456, "updated_at": 1513076364, "pointer_test_order": { "created_at": 1538966895, "_table": "test_order", "id": "5bbac56fbd66033df7fd0aa2", "created_by": 61736923, "updated_at": 1538966895 } } ``` **请求示例 2** ```java Query query = new Query() .select("title", "content", "pointer_test_oder") .expand("pointer_test_oder") .put(where); PagedList contents = Contents.contents(query); ``` **请求结果 2** ```json { "data": { "meta": { "next": null, "offset": 0, "total_count": 1, "limit": 20, "previous": null }, "objects": [ { "content": "

\b 该片讲述了伊娅不满父亲的恶作剧

", "title": "iphone X", "pointer_test_order": { "created_at": 1538966895, "_table": "test_order", "id": "5bbac56fbd66033df7fd0aa2", "created_by": 61736923, "updated_at": 1538966895, "pointer_test_order": { "created_at": 1538966895, "_table": "test_order", "id": "5bbac56fbd66033df7fd0aa2", "created_by": 61736923, "updated_at": 1538966895 } } } ] } } ``` ### 获取分类详情 `Contents.contentCategory(id)` **`ContentCategory` 结构** | 参数 | 类型 | 说明 | | ------------------------------ | ------- | ------- | | ContentCategory.CHILDREN | Array | 子分类列表 | | ContentCategory.HAVE\_CHILDREN | Boolean | 是否含有子分类 | | ContentCategory.ID | String | 分类 ID | | ContentCategory.NAME | String | 分类名称 | **ContentCategory请求示例** ```java Contents.contentCategory("1513076252710475"); ``` **返回示例** ```json { "have_children": true, "id": 1513076252710475, "name": "科技", "children": [ { "have_children": false, "id": 1514515552050186, "name": "评测" } ] } ``` ### 获取内容库分类列表 `Contents.contentGroups(query)` **请求示例** ```java PagedList groups = Contents.contentGroups(null); ``` ### 分页与排序 内容查询的分页与排序操作和[数据表分页与排序](/baas-js-sdk/android-sdk/schema/limit-and-order.md)方法一致。 **请求示例** ```java Query query = new Query().offset(10).limit(5).orderBy("-created_by") PagedList groups = Contents.contentGroups(query); ``` --- # Agent Instructions: 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: ``` GET https://ifanr.gitbook.io/baas-js-sdk/android-sdk/content/operate.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.