c++ - QT5/QSql bindValue query doesn't work -


i have query made qsql 

query.prepare("select id,title,content posts order :field :order limit :limit offset :offset"); query.bindvalue(":field",qvariant(field)); query.bindvalue(":order",order); query.bindvalue(":limit",limit); query.bindvalue(":offset",offset);

i use order value "desc" doesn't work properly. , when 

query.prepare("select id,title,content posts order "+field+"  "+order+" limit :limit offset :offset"); query.bindvalue(":limit",limit); query.bindvalue(":offset",offset);

it works fine , don't know why. values of same type ( qstring , int ). suggestions ?

thanks.


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