1
目前有一個圖紙模型,與特定的jsonb屬性:的PostgreSQL 9.4 jsonb我怎麼RO查詢
create_table "sheets", force: :cascade do |t|
t.string "name"
t.integer "user_id", default: 0, null: false
t.boolean "private", default: true, null: false
t.jsonb "t_data", default: {}, null: false
end
在T_DATA jsonb屬性,我要存儲一個列表(這樣多線),其含量應像這樣:
def sample_3_content
{
headings: [
"Rendering engine",
"Browser",
"Platform",
"Engine version",
"CSS grade"
],
rows: {
"line_0":{
"Rendering engine":"Trident",
"Browser":"Internet Explorer 4.0",
"Platform":"Win 95+",
"Engine version":"4.0",
"CSS grade":"X"
},
"line_1":{
"Rendering engine":"Trident",
"Browser":"Internet Explorer 5.0",
"Platform":"Win 95+",
"Engine version":"5",
"CSS grade":"C"
},
此查詢
Sheet('rows @> ?', {"CSS grade" => "X" }.to_json)
是引發錯誤
NoMethodError: undefined method `Sheet' for main:Object
我不確定這是最好的模式...因爲我想查詢不同標題上的所有行,即「CSS等級」==「X」,「瀏覽器」包含「資源管理器」.. 。
重寫我的架構的任何建議,歡迎...
謝謝..得到它我更新了我的模式.. – erwin