'ipairs' 的错误参数 #1（预期的表，得到布尔值）

Question

控制台错误；

117: call: failed to call 'mysql:select' [string "?"]
117: bad argument #1 to 'ipairs' <table expected, got boolean>

函数；

function openAdvertisements( player, command )
    local advertisements = { } --These will hold our advertisements to send to the client and populate our advertisement tables.

    if not player then player = source end

    --Fetch all of the advertisements from the database
    for _, ad in ipairs( exports.mysql:select('advertisements') ) do
        if tonumber( ad.expiry ) >= tonumber( getRealTime().timestamp ) then --Check if the advertisement has expired, delete it if so.
            ad.author = exports.mysql:select_one( "characters", { id = ad.created_by } ).charactername
            table.insert( advertisements, ad )
        else
            deleteAdvertisement( ad.id )
        end
    end

    triggerClientEvent( player, resourceName .. ":display_all", root, advertisements, exports.integration:isPlayerAdmin( player ) ) --Send the advertisements to the client to create the GUI.
end

第 117 行； 对于 _，ipairs 中的广告（exports.mysql:select('advertisements')）做 离开Cs(cid)

Answer 1

什么时候 exports.mysql:select('advertisements') 失败返回 boolean 并且您不能在 boolean 值上使用 ipairs，因为 ipairs 可以与表一起使用。

为什么exports.mysql:select('advertisements') 打电话失败？

因为 在表格周围加上引号，因为它们不是字符串 并且应该这样做

exports.mysql:select("SELECT * FROM 'advertisements' WHERE <something>")