update: opendb-china-cities 增加字段type, letter、pinyin、zip_code，同步数据支持，增加索引

collection/opendb-china-cities/collection.json

@@ -13,13 +13,92 @@
       },
       "name": {
         "bsonType": "string",
-        "description": "名称"
+        "description": "城市名称",
+        "title": "城市"
+      },
+      "type": {
+        "bsonType": "int",
+        "description": "城市类型；0省，1市，2区"
+      },
+      "letter": {
+        "bsonType": "string",
+        "description": "拼音首字母"
+      },
+      "pinyin": {
+        "bsonType": "string",
+        "description": "城市名称的完整汉语拼音，用于拼音检索"
       },
       "parent_code": {
         "bsonType": "string",
         "description": "父级编码"
+      },
+      "zip_code": {
+        "bsonType": "string",
+        "description": "邮政编码",
+        "title": "邮编"
       }
     }
   },
-  "index": []
+  "index": [
+    {
+      "IndexName": "code_",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "code",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": true
+      }
+    },
+    {
+      "IndexName": "name",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "name",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": false
+      }
+    },
+    {
+      "IndexName": "letter",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "letter",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": false
+      }
+    },
+    {
+      "IndexName": "pinyin",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "name",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": false
+      }
+    },
+    {
+      "IndexName": "parent_code",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "parent_code",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": false
+      }
+    },
+    {
+      "IndexName": "zip_code",
+      "MgoKeySchema": {
+        "MgoIndexKeys": [{
+          "Name": "zip_code",
+          "Direction": "1"
+        }],
+        "MgoIsUnique": false
+      }
+    }
+  ]
 }