查询以将json对象数组插入postgres [英] Query to insert array of json object into postgres

问题描述

我有一个表，其中的字段为 fields json [] 。我创建了一个将记录插入到该表中的函数，这是调用

I have a table with field fields json[]. I have created a function to insert the record into that table and here is the call

select * from add('[{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutral","value":"neutral"}]') as result;

这是函数本身

CREATE OR REPLACE FUNCTION public.add(
    _fields json[]) RETURNS SETOF json 
LANGUAGE 'plpgsql'
AS $BODY$
     DECLARE
        query text;
    BEGIN
        insert into my_table(fields)
          values(_fields);
        query = 'SELECT json_build_object(''message'', ''Added.'')';
        RETURN QUERY EXECUTE query; 
        END;
$BODY$;

但这显示

malformed array literal: "[{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutra

然后我尝试了此

select * from add('{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutral","value":"neutral"}') as result;

，此插入语句的功能类似于

and this insert statement in function like

insert into polls(fields) values(array([''||_fields||'']::json[]));

这表明

syntax error at or near "["

或附近的语法错误

推荐答案

我每个对象都缺少 。这是创建json对象的方法

I was missing " for each individual object. This is how to create json object

{"{\"name\":\"Yes\",\"value\":\"yes\"}","{\"name\":\"No\",\"value\":\"no\"}","{\"name\":\"Neutral\",\"value\":\"neutral\"}"}

所以最终查询是

select * from add('{"{\"name\":\"Yes\",\"value\":\"yes\"}","{\"name\":\"No\",\"value\":\"no\"}","{\"name\":\"Neutral\",\"value\":\"neutral\"}"}') as result;

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