数据字典

OData服务是一种自描述服务，它公开定义实体集，关系，实体类型和操作的元数据 获取对象的数据结构接口。

接口信息

• 请求地址：/api/v4/$metadata

• 请求方法：GET

• 接口说明：

  • spaceId：工作区ID
  • $metadata：固定值

• 返回值：服务端数据结构文档

• 示例如下： - HTTP 请求

         ```
          url 
            -X GET https://beta.steedos.com/api/odata/v4/Af8e****DqD3/$metadata
         ```
      - HTTP 响应
          ```
          相关属性介绍
            EntityType:表(对象)的属性
            Property：表的字段。包含字段名，字段类型。
            NavigationProperty：关联属性。包含关联表，关联字段。
          <?xml version="1.0" encoding="UTF-8"?>
          <edmx:Edmx xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx" Version="4.0">

  <edmx:DataServices>

   <Schema xmlns="http://docs.oasis-open.org/odata/ns/edm" Namespace="SteedosEntities">
       <EntityType Name="object_recent_viewed">
           <Key>
               <PropertyRef Name="_id"/>
           </Key>
           <Property Name="_id" Type="Edm.String" Nullable="false"/>
           <Property Name="record" Type="Edm.String"/>
           <Property Name="space" Type="Edm.String"/>
           <Property Name="owner" Type="Edm.String"/>
           <Property Name="created" Type="Edm.DateTimeOffset" Precision="8"/>
           <Property Name="created_by" Type="Edm.String"/>
           <Property Name="modified" Type="Edm.DateTimeOffset" Precision="8"/>
           <Property Name="modified_by" Type="Edm.String"/>
           <Property Name="is_deleted" Type="Edm.Boolean"/>
           <Property Name="sharing" Type="Edm.String"/>
           <NavigationProperty Name="space_expand" Type="SteedosEntities.spaces" Partner="object_recent_viewed">
               <ReferentialConstraint Property="space" ReferencedProperty="_id"/>
     
           </NavigationProperty>
           <NavigationProperty Name="owner_expand" Type="SteedosEntities.users" Partner="object_recent_viewed">
               <ReferentialConstraint Property="owner" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="created_by_expand" Type="SteedosEntities.users" Partner="object_recent_viewed">
               <ReferentialConstraint Property="created_by" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="modified_by_expand" Type="SteedosEntities.users" Partner="object_recent_viewed">
               <ReferentialConstraint Property="modified_by" ReferencedProperty="_id"/>
           </NavigationProperty>
       </EntityType>
       ......
       <EntityType Name="object_listviews">
           <Key>
               <PropertyRef Name="_id"/>
           </Key>
           <Property Name="_id" Type="Edm.String" Nullable="false"/>
           <Property Name="name" Type="Edm.String" Nullable="false"/>
           <Property Name="object_name" Type="Edm.String" Nullable="false"/>
           <Property Name="filter_scope" Type="Edm.String" Nullable="false"/>
           <Property Name="columns" Type="Edm.String"/>
           <Property Name="shared" Type="Edm.Boolean"/>
           <Property Name="filters" Type="Edm.String"/>
           <Property Name="filters.$" Type="Edm.String"/>
           <Property Name="filter_logic" Type="Edm.String"/>
           <Property Name="is_default" Type="Edm.Boolean"/>
           <Property Name="owner" Type="Edm.String"/>
           <Property Name="space" Type="Edm.String"/>
           <Property Name="created" Type="Edm.DateTimeOffset" Precision="8"/>
           <Property Name="created_by" Type="Edm.String"/>
           <Property Name="modified" Type="Edm.DateTimeOffset" Precision="8"/>
           <Property Name="modified_by" Type="Edm.String"/>
           <Property Name="is_deleted" Type="Edm.Boolean"/>
           <Property Name="sharing" Type="Edm.String"/>
           <NavigationProperty Name="object_name_expand" Type="SteedosEntities.objects" Partner="object_listviews">
               <ReferentialConstraint Property="object_name" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="owner_expand" Type="SteedosEntities.users" Partner="object_listviews">
               <ReferentialConstraint Property="owner" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="space_expand" Type="SteedosEntities.spaces" Partner="object_listviews">
               <ReferentialConstraint Property="space" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="created_by_expand" Type="SteedosEntities.users" Partner="object_listviews">
               <ReferentialConstraint Property="created_by" ReferencedProperty="_id"/>
           </NavigationProperty>
           <NavigationProperty Name="modified_by_expand" Type="SteedosEntities.users" Partner="object_listviews">
               <ReferentialConstraint Property="modified_by" ReferencedProperty="_id"/>
           </NavigationProperty>
       </EntityType>