update document and screenshot

Author: zhangchunlin

demo/doc/imgs/demo_screenshot.png

@@ -9,174 +9,24 @@ uliweb-apijson is a subset and slightly different variation of [apijson](https:/
 ```
 [APIJSON_MODEL_CONFIG]
 user = {
-    "public" : False,
     "user_id_field" : "id",
     "secret_fields" : ["password"],
-    "default_filter_by_self" : True
+    "rbac_get" : {
+        "roles" : ["ADMIN","OWNER"]
+    }
 }
 ```
 
 ## document
 
 settings.APIJSON_MODEL_CONFIG.[MODEL_NAME]
 
-| Field                  | Doc                                                          |
-| ---------------------- | ------------------------------------------------------------ |
-| public                 | Default to be "False".<br />If not public, should be **login user** and only can see **user own data**. |
-| user_id_field          | Field name of user id, related to query user own data.       |
-| secret_fields          | Secret fields won't be exposed.                              |
-| default_filter_by_self | If True, when no filter parameter, will filter by self user id |
+| Field         | Doc                                                        |
+| ------------- | ---------------------------------------------------------- |
+| user_id_field | Field name of user id, related to query user own data.     |
+| secret_fields | Secret fields won't be exposed.                            |
+| rbac_get      | Configure of roles or permissions for apijson 'get' method |
 
 # Supported API Examples
 
-### Single record query: with id as parameter
-
-URL: apijson/get
-
-Method: POST
-
-Request:
-
-```
-{
-   "user":{
-     "id":1
-   }
-}
-```
-
-Response:
-
-```
-{
-  "code": 200,
-  "msg": "success",
-  "user": {
-    "username": "usera",
-    "nickname": "User A",
-    "email": "usera@localhost",
-    "is_superuser": false,
-    "last_login": null,
-    "date_join": "2018-12-05 15:44:26",
-    "image": "",
-    "active": false,
-    "locked": false,
-    "deleted": false,
-    "auth_type": "default",
-    "id": 1
-  }
-}
-```
-
-### Single record query: no parameter
-
-URL: apijson/get
-
-Method: POST
-
-Request:
-
-```
-{
-   "user":{
-   }
-}
-```
-
-Response:
-
-```
-{
-  "code": 200,
-  "msg": "success",
-  "user": {
-    "username": "usera",
-    "nickname": "User A",
-    "email": "usera@localhost",
-    "is_superuser": false,
-    "last_login": null,
-    "date_join": "2018-12-05 15:44:26",
-    "image": "",
-    "active": false,
-    "locked": false,
-    "deleted": false,
-    "auth_type": "default",
-    "id": 1
-  }
-}
-```
-
-### Single record query: @column
-
-URL: apijson/get
-
-Method: POST
-
-Request:
-
-```
-{
-   "user":{
-     "@column": "id,username,email"
-   }
-}
-```
-
-Response:
-
-```
-{
-  "code": 200,
-  "msg": "success",
-  "user": {
-    "username": "usera",
-    "email": "usera@localhost",
-    "id": 1
-  }
-}
-```
-
-### Array query
-
-URL: apijson/get
-
-Method: POST
-
-Request:
-
-```
-{
-  "[]":{
-    "@count":2,
-    "@page":0,
-    "user":{
-      "@column":"id,username,nickname,email",
-      "@order":"id-"
-    }
-  }
-}
-```
-
-Response:
-
-```
-{
-  "code": 200,
-  "msg": "success",
-  "[]": [
-    {
-      "username": "userc",
-      "nickname": "User C",
-      "email": "userc@localhost",
-      "id": 3
-    },
-    {
-      "username": "userb",
-      "nickname": "User B",
-      "email": "userb@localhost",
-      "id": 2
-    }
-  ]
-}
-```
-
+Please run [demo](../../demo/README.md) project and try it.