我想要使用Ruby 祖先作为父类别,但我收到了这个错误:
ActiveRecord::StatementInvalid in Categories#new PG::SyntaxError:
ERROR: syntax error at or near ")" LINE 1: ...ECT "categories".* FROM "categories" WHERE (id != ) ORDER BY...
笔划:
<%= form.collection_select :parent_id, Category.where("id != #{@category.id}").order(:name), :id, :name, {include_blank: true} %>
我不知道该怎么办了.这是我第一次收到这个错误