[英]How to append nested key-value to json array in postgresql?
My json
values in jsonb column are below:我在 jsonb 列中的
json
值如下:
{"Id": "7324326", "UserName":"Henry", "Details": {"Email":"henry@test.com", "Phone":"03722", "Images": ["https://face.png"]}}
{"Id": "325325", "UserName":"Mark", "Details": {"Email":"mark@test.com", "Phone":"83272", "Images": ["https://hair.png", "https://nose.png"]}}
{"Id": "832743", "UserName":"David", "Details": {"Email":"david@test.com", "Phone":"65128", "Images": []}}
I have nested key - "Images"
that has array of strings.我有嵌套键 - 具有字符串数组的
"Images"
。 How to write query that will add to Images
new keys/values ("UploadedBy":null and "Size":null)
and transform array of string to key-value ("https://face.png" -> "Link":"https://face.png")
like below:如何编写将向
Images
添加新键/值的查询("UploadedBy":null and "Size":null)
并将字符串数组转换为键值("https://face.png" -> "Link":"https://face.png")
如下所示:
{"Id": "7324326", "UserName":"Henry", "Details": {"Email":"henry@test.com", "Phone":"03722", "Images": [{"Link":"https://face.png", "UploadedBy":null, "Size":null}]}}
{"Id": "325325", "UserName":"Mark", "Details": {"Email":"mark@test.com", "Phone":"83272", "Images": [{"Link":"https://hair.png", "UploadedBy":null, "Size":null}, {"Link":"https://nose.png", "UploadedBy":null, "Size":null}]}}
{"Id": "832743", "UserName":"David", "Details": {"Email":"david@test.com", "Phone":"65128", "Images": []}}
You can use jsonb_set
:您可以使用
jsonb_set
:
update tbl set js = jsonb_set(js, '{Details,Images}'::text[],
coalesce((select jsonb_agg(jsonb_build_object('Link', v.value, 'UploadedBy', null, 'Size', null))
from jsonb_array_elements(js -> 'Details' -> 'Images') v), '[]'::jsonb))
See fiddle . 见小提琴。
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