如何查詢Google Cloud Datastore中的數組

Question

我已經查詢到獲取所有Event Data實體的列表。結果是谷歌數據存儲這樣來了。

[{ 
    "key": { 
    "id": 5678669024460800, 
    "kind": "Event", 
    "path": [ 
     "Event", 
     5678669024460800 
    ] 
    }, 
    "data": { 
    "createdAt": "2017-03-27T06:28:58.000Z", 
    "users":["test1@xxx.com","test2@xxx.com","test3@xxx.com"] 
    } 
}, 
{ 
    "key": { 
    "id": 5678669024460800, 
    "kind": "Event", 
    "path": [ 
     "Event", 
     5678669024460800 
    ] 
    }, 
    "data": { 
    "createdAt": "2017-03-27T06:28:58.000Z", 
    "users":["test1@xxx.com"] 
    } 
}, 
{ 
    "key": { 
    "id": 5678669024460800, 
    "kind": "Event", 
    "path": [ 
     "Event", 
     5678669024460800 
    ] 
    }, 
    "data": { 
    "createdAt": "2017-03-27T06:28:58.000Z", 
    "users":["test2@xxx.com","test3@xxx.com"] 
    } 
}] 

但我需要寫一個查詢過濾Email'id。意味着我需要獲取與電子郵件ID匹配的實體。例如，如果我通過電子郵件作爲「test1@xxx.com」我應該得到這樣的最終結果。任何人都可以幫助我解決這個問題。

[{ 
    "key": { 
    "id": 5678669024460800, 
    "kind": "Event", 
    "path": [ 
     "Event", 
     5678669024460800 
    ] 
    }, 
    "data": { 
    "createdAt": "2017-03-27T06:28:58.000Z", 
    "users":["test1@xxx.com","test2@xxx.com","test3@xxx.com"] 
    } 
}, 
{ 
    "key": { 
    "id": 5678669024460800, 
    "kind": "Event", 
    "path": [ 
     "Event", 
     5678669024460800 
    ] 
    }, 
    "data": { 
    "createdAt": "2017-03-27T06:28:58.000Z", 
    "users":["test1@xxx.com"] 
    } 
}] 

Answer 1

的GQL查詢會是這樣的 -

SELECT * FROM Event WHERE users='test1@xxx.com' 

你需要確保users財產是爲了索引的搜索工作，否則你可能不會得到任何結果回來。