備忘：工作記錄。

# attr_json:{"ext": {"conditions": {"appId": "168","templateSettings": {"is_show": true,"pages": ["pages/1/index", "pages/2/index"]}}}}

Program::Data.find_by_sql(
    "select * from program_data where 
        attr_json::json->'ext'->'conditions'->>'templateSettings' 
            is not null")
 

::json | json格式；
->     | 下級key (仍為json)
->>    | 下級key (轉為text？varchar？)
再做條件對比。