QLIK Sense REST 请求答案

【问题标题】：QLIK Sense REST requestQLIK Sense REST 请求
【发布时间】：2018-02-18 00:29:50
【问题描述】：

我使用下面的 URL 在 Qlik Sense 中建立了一个 REST 连接，但我使用的 URL 将只返回播放器 ID 237 的数据。我想返回播放器库下的所有数据，而不是返回一个特定 ID .

http://api.football-api.com/2.0/player/237?Authorization=0123456789

我尝试使用星号 (*) 而不是 237，但它不起作用，我想知道查询参数或查询标题字段是否可能是解决方案。我见过的所有填写 REST 连接表单的示例都很简单，在这种情况下没有帮助。

【问题讨论】：

【解决方案1】：

您不能将 player 替换为 * 并期望获得所有数据。这不是 REST API 的工作方式。理想情况下，您应该拥有players（例如）端点，该端点应该返回所有玩家（包括他们id）的列表，然后遍历所有玩家（或子集）以获得更多详细信息。据我所知，football-api.com api 文档中没有这样的端点。如果他们可以为您提供此类信息，可能最好联系他们的支持团队

在 Qlik 中，此解决方案可能如下所示：

// Lets imagine that this table is the API response that
// returns list with all players
Players:
Load * Inline [
  playerId
  1
  2
  3
  4
  5
]; 

// Loop through all values in playerId field
for i = 0 to FieldValueCount('playerId')

  // vPlayerId variable will hold the current iteration player id
  let vPlayerId = FieldValue('playerId', $(i))

  // Load player data. The player id variable is in the url
  Details:
  Load
    *
  From
    http://api.football-api.com/2.0/$(vPlayerId)/237?Authorization=0123456789
  ;

next

// We can drop the Players table if not needed anymore
Drop Table Players;

顺便说一句，不要将Authorization 键之类的东西放在互联网上。

【讨论】：

【解决方案2】：

文档： https://football-api.com/documentation2/#!/Player/get_player_player_id

说player_id是必需的，你不能用*下载全部。

我认为绕过它的方法是使用循环逐个播放器询问玩家：

FOR i=1 to 1000

    // your code here just get player using $(i) as id
    // you can save also player data as qvd so you will not ask another time for that
    // (most api have plimitation with number of calls)

NEXT i

【讨论】：

【解决方案3】：

你可以用变量代替数字。

我没有权限无法查看数据，需要知道URL中playerID的总数。

// Variable setting, Total Row of PlayerID's Number.
let Id = FieldValue('playerId', 1);
//or
let Id = total number; 


// Loop Start
for start = 1 to $(ID)


// exampleQuery
RestConnectorMasterTable:
SQL SELECT
    "__KEY_...."
    (SELECT ....
     FROM ...)
    FROM XML ...
WITH CONNECTION(Url "http://api.football-api.com/2.0/player/$(start)?Authorization=0123456789");

/* put a variable instead of ID's number in the WITH CONNECTION statement. */


// Loop End
Next start;


Play:
Load *
Resident RestConnectorMasterTable
Where Not IsNull([__FK_...]);


Drop table RestConnectorMasterTable;

希望对你有帮助:)

---- 附加 ----

我检查了 api。

简单地运行从 1 到 number 的循环将导致 404 错误。（不存在的参数）

您需要 9002 团队的 player_id 吗？
如果是这样，可以在 root 下找到 9002 团队的 player_id。
（休息连接→选择要加载的数据→根>小队）

因此，可以先获取小队表的 id 字段，然后在 id 上循环。

第 1 步）
将 Rest 连接器连接到 team API。
http://api.football-api.com/2.0/team/9002?Authorization=1234567890

团队的参数是9002。

第 2 步）
点击Select data to load选择root下的小队数据。
并且只有 id 字段进入了小队表。（共 28 行）
enter image description here

stpe 3)
在现有的 player_id RestConnector 选项中将分页类型设置为 Custom。
（创建了WITH CONNECTION STATEMENT。）
enter image description here

第 4 步）
请参阅下面的脚本并执行加载。

// Team API Connect
LIB CONNECT TO 'Football_Team';

RestConnectorMasterTable:
SQL SELECT 
    "__KEY_root",
    (SELECT 
        "id",
        "name",
        "__FK_squad"
    FROM "squad" FK "__FK_squad")
FROM JSON (wrap on) "root" PK "__KEY_root";

[squad]:
LOAD    [id] AS [id],
        [name] AS [name]
RESIDENT RestConnectorMasterTable
WHERE NOT IsNull([__FK_squad]);


DROP TABLE RestConnectorMasterTable;



// Player_Id API Connect
LIB CONNECT TO 'Football_playerId';

LET total = NoOfRows('squad');        // Number of total.

For i = 0 to $(total) - 1
LET vID = Peek('id', $(i), 'squad');  // Loop start id by 9002 team.


// The following default script was commented out unnecessarily.
// Action required: Implement the logic to retrieve the total records from the REST source and assign to the 'total' local variable.
// Let total = 0;
// Let totalfetched = 0;
// Let startAt = 0;
// Let pageSize = 100;
// for startAt = 0 to total step pageSize

RestConnectorMasterTable:
SQL SELECT 
    "id" AS "id_u3",
    "common_name",
    "name" AS "name_u3",
    "firstname",
    "lastname",
    "team",
    "teamid",
    "nationality",
    "birthdate",
    "age",
    "birthcountry",
    "birthplace",
    "position",
    "height",
    "weight",
    "__KEY_root"
FROM JSON (wrap on) "root" PK "__KEY_root"
WITH CONNECTION(Url "http://api.football-api.com/2.0/player/$(vID)?Authorization=0123456789");
// player/id? → Change the ID to a variable. *****
// Action required: change URL included in 'WITH CONNECTION' as needed to support pagination for the REST source. 
// Please see the documentation for "Loading paged data."
// NEXT startAt;


[Player]:
LOAD    [id_u3] AS [id_u3],
        [common_name] AS [common_name],
        [name_u3] AS [name_u3],
        [firstname] AS [firstname],
        [lastname] AS [lastname],
        [team] AS [team],
        [teamid] AS [teamid],
        [nationality] AS [nationality],
        [birthdate] AS [birthdate],
        [age] AS [age],
        [birthcountry] AS [birthcountry],
        [birthplace] AS [birthplace],
        [position] AS [position],
        [height] AS [height],
        [weight] AS [weight]
    //  , [__KEY_root] AS [__KEY_root]
RESIDENT RestConnectorMasterTable
WHERE NOT IsNull([__KEY_root]);

DROP TABLE RestConnectorMasterTable;

Next i;  // Loop End.


DROP TABLE squad;  // id info table delete.

听听结果：
enter image description here

希望你得到你想要的结果：D

【讨论】：