[英]Updated query in nested JSON with Postgres removes data
我有這個 JSON 文檔
{
"name": "Perry Street Brasserie",
"cuisine": "French",
"stars": 0.3,
"address": {
"street": "959 Iveno Square",
"city": "Fokemlid",
"state": "AL",
"zipcode": "18882"
},
"reviews": [
{
"person": {
"_id": {
"$oid": "57d7a121fa937f710a7d486e"
},
"address": {
"city": "Burgessborough",
"street": "83248 Woods Extension",
"zip": "47201"
},
"birthday": {
"$date": "2011-03-17T11:21:36Z"
},
"email": "murillobrian@cox.net",
"first_name": "Yvonne",
"job": "Counselling psychologist",
"last_name": "Pham"
},
"comment": "Aliquam est reiciendis alias neque ad.",
"created_on": {
"$date": "2018-02-01T01:56:29.627Z"
}
}
我需要更改 first_name 值,但我的查詢只是刪除了與該名稱相關的數據。 因此,我的查詢成功執行,但最終刪除數據而不是更新數據。
我嘗試了以下兩個查詢,都給了我相同的結果
UPDATE restaurants
SET info = jsonb_set('{"reviews":["person"]}', '{"first_name"}', '"Vedat"', true)
WHERE info ->'reviews'-> 0 -> 'person' ->> 'first_name' = 'John'
UPDATE restaurants
SET info = info::jsonb - 'first_name' || '{"reviews":[{"person": {"first_name":"Vedat"}}]}'
WHERE info::json->'reviews'-> 0 -> 'person' ->> 'first_name' = 'Jenna'
您沒有將整列作為第一個值傳遞,您需要以數組的形式提供要更改的值的路徑:
例如:
UPDATE restaurants
SET info = jsonb_set(info, '{reviews,0,person,first_name}', '"Vedat"', true)
WHERE info->'reviews'->0->'person'->>'first_name' = 'John';
因此,您實際上必須將整個 JSON 文檔傳遞給 jsonb_set,它將返回修改后的文檔。
問候
湯姆
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