在postgresql中使用rails在“{”处或附近出现语法错误[关闭]

Question

以下查询在 Mysql 中有效，但在 postgresql 中无效。

Campaign.scheduled_with_community_ids(community_ids).
        joins(:community).
        order('FIELD(campaigns.id, #{editable_ids}) DESC').
        order(:launch_date, 'communities.community_name')

正在低于错误

ActiveRecord::StatementInvalid - PG::SyntaxError: ERROR:  syntax error at or near "{" LINE 2: ...s" = 's_approved')) ORDER BY FIELD(campaigns.id, #{editable_...

请任何人帮助我

Answer 1

当你想使用插值时，你应该使用双引号：

Campaign.scheduled_with_community_ids(community_ids).
    joins(:community).
    order("FIELD(campaigns.id, #{editable_ids}) DESC").
    order(:launch_date, 'communities.community_name')

Answer 2

不要使用single qoute 试试double qoute：

Campaign.scheduled_with_community_ids(community_ids).
    joins(:community).
    order("FIELD(campaigns.id, #{editable_ids}) DESC").
    order(:launch_date, 'communities.community_name')

Answer 3

改变这个

Campaign.scheduled_with_community_ids(community_ids).
        joins(:community).
        order('FIELD(campaigns.id, #{editable_ids}) DESC').
        order(:launch_date, 'communities.community_name')

到这里

Campaign.scheduled_with_community_ids(community_ids).
        joins(:community).
        order("FIELD(campaigns.id, #{editable_ids}) DESC").
        order(:launch_date, 'communities.community_name')

你必须使用双引号才能插入