Question

在collection_select中，我需要传递以下参数。总计7，但方法接受最多6，我怎么加入？

<%= f.collection_select :skill_list, Project.tag_counts_on(:skills).order(:name), :id, :name, {}, {multiple: true}, validate: true, class: 'form-control' %>

Answer 1

尝试使用此语法

//set cookie
function setCookie(cname,cvalue,exdays) {
    var url = window.location.pathname;
    var d = new Date();
    d.setTime(d.getTime() + (exdays*24*60*60*1000));
    var expires = "expires=" + d.toGMTString();
    if(url.indexOf('wholesale') > -1) {
        document.cookie = cname+"="+cvalue+"; "+expires+";path=/wholesale";
    } else {
     document.cookie = cname+"="+cvalue+"; "+expires;
    }
}

Answer 2

错误的参数数量（给定7，预期4..6）

问题是你将参数传递给collection_select是错误的。

collection_select（对象，方法，集合，value_method， text_method，options = {}，html_options = {}

multiple: true和validate :true应取代options = {}而class: 'form-control'应该进入html_options = {}。以下应该有效

<%= f.collection_select :skill_list, Project.tag_counts_on(:skills).order(:name), :id, :name, {multiple: true, validate: true}, class: 'form-control' %>

Answer 3

您可以使用以下代码段用集合填充select标签

<%= form.select :project, options_from_collection_for_select(Project.all, "id", "title"),{class: "project_title", include_blank: "--Please Select--"  } %>

helper colllection_select，参数个数错误（给定7，预期4..6）

3 个答案: