Question

使用node-pg我尝试查找JSON对象中是否存在字符串。

示例（部分）行：

{ viq_id: '801583',
    title: 'Blank, security key, lock system, and production method',
    applicants: [ [Object], [Object] ],
    cpc: [ [Object], [Object] ],
    abstract: { value: [Object], language: 'en' } }

abstract的类型为JSONB。查询时

 var query = 'SELECT viq_id, title, applicants, cpc, abstract ->> "value"' +
    ' FROM epo_patents' +
    ' WHERE title ILIKE $1';

或为此

var query = 'SELECT viq_id, title, applicants, cpc, abstract' +
        ' FROM epo_patents' +
        ' WHERE title ILIKE $1 OR abstract ->> "value" = $1';

或为此

var query = 'SELECT viq_id, title, applicants, cpc, abstract' +
        ' FROM epo_patents' +
        ' WHERE abstract.value = $1';

答案是＆＃34; errorMissingColumn＆＃34;，或者在后一种情况下errorMissingRTE

如何在节点pg中正确查询JSON？

Answer 1

将var query = 'SELECT viq_id, title, applicants, cpc, abstract ->> "value"'更改为var query = "SELECT viq_id, title, applicants, cpc, abstract ->> 'value'"，因为用于db对象（表，列等）的双引号名称... 看看Postgres JSON syntax

节点Postgres查询json

1 个答案: