arangodb AQL如何修改嵌套數組中對象的值？

Question

我的文檔組織這樣的方式：

{ 
    "email": "tyler_li@126.com", 
    "name": "tyler", 
    "address": { 
    "street": "Beijing Road", 
    "zip": 510000 
    }, 
    "likes": [ 
    "running", 
    { 
     "movie": "Star Wars" 
    } 
    ] 
} 

我在修改的「電影」的價值問題。你能幫助我，如何用AQL修改價值？

謝謝！

Answer 1

以下查詢應該執行。我把解釋作爲評論內的註釋。我的示例假定文檔存在於名爲collection的集合中：

FOR doc IN collection 
    /* any filter condition to find the document(s) in question. 
    you should make sure this uses an index if there is a substantial 
    number of documents in the collection */ 
    FILTER doc.name == 'tyler' 

    /* enumerate the old likes and return them as is if they are not 
    of type object or do not have a 'movie' attribute. If they are 
    objects and have a 'movie' attribute, patch them with a 'movie' 
    value of 'whatever' */ 
    LET newLikes = (
    FOR oldLike IN doc.likes 
     RETURN 
     (TYPENAME(oldLike) == 'object' && HAS(oldLike, 'movie')) ? 
      { movie: 'whatever' } : 
      oldLike 
) 

    /* finally update the matching document(s) with the new likes */ 
    UPDATE doc WITH { likes: newLikes } IN collection