Question

我使用http://htmltohaml.com/来转换我的ERB并且存在某种问题。

转换前的工作ERB

<input name="shares" ng-model="shares"  type="number" required>
<input name="name" ng-model="name" required>

转换后不使用HAML：

这是我的错误：显示/Users/project/app/views/shared/_employee.html.haml第9行引出：

<h3><%= t("admin.labels.employee") %> <%= content_tag(:span, employee_counter) %></h3>
<%
   def create_validation_rules(field_rules)
     Hash[field_rules.map do |rule|
            next ["rule-#{rule[:name]}", rule[:value]] if rule[:value]
            next ["msg-#{rule[:name]}", rule[:msg]] if rule[:msg]
          end] if field_rules
   end
%>
<div class="control-group form-controls">
    <%= f.label :first_name, t("labels.name") %>
    <%= f.text_field :first_name, placeholder: t("labels.first_name"), class: 'js-employeeName', id: "merchant_employees_attributes_#{index}_first_name", name: "merchant[employees_attributes][#{index}][first_name]", autocomplete: "off", maxlength: 50, size: nil, data: create_validation_rules(validations[:first_name]) %>
    <%= f.text_field :middle_name, placeholder: t("labels.middle_name"), id: "merchant_employees_attributes_#{index}_middle_name", name: "merchant[employees_attributes][#{index}][middle_name]", autocomplete: "off", maxlength: 100, size: nil %>
    <%= f.text_field :last_name, placeholder: t("labels.last_name"), class: 'js-employeeName', id: "merchant_employees_attributes_#{index}_last_name", name: "merchant[employees_attributes][#{index}][last_name]", autocomplete: "off", maxlength: 50, size: nil, data: create_validation_rules(validations[:last_name]) %>
</div>
<div class="control-group">
  <%= f.label :email, t("labels.email_address") %>
  <%= f.text_field :email, id: "merchant_employees_attributes_#{index}_email", name: "merchant[employees_attributes][#{index}][email]", autocomplete: "off", maxlength: 250, size: nil, data: create_validation_rules(validations[:email]) %>
</div>
<div class="control-group">
  <% if force_superuser_role %>
      <%= f.hidden_field :superuser, value: "1" %>
  <% else %>
      <%= f.label :superuser, t("admin.labels.superuser") %>
      <%= f.check_box :superuser, class: "superuser_checkbox", id: "merchant_employees_attributes_#{index}_superuser", name: "merchant[employees_attributes][#{index}][superuser]"%>
  <% end %>
</div>

Answer 1

正确处理此问题的方法是将方法定义为控制器中的帮助程序：

class MyController
  helper_method :create_validation_rules

private
  def create_validation_rules(field_rules)
    Hash[field_rules.map do |rule|
      next ["rule-#{rule[:name]}", rule[:value]] if rule[:value]
      next ["msg-#{rule[:name]}", rule[:msg]] if rule[:msg]
    end] if field_rules
  end
end

这样您就可以在视图中调用create_validation_rules，而无需在那里定义方法。请参阅In Rails, what exactly do helper and helper_method do?以了解帮助方法的确切含义及其工作原理。

但是，如果您只是必须在View代码中使用嵌入式方法，那么有一个解决方案：您可以简单地删除内联函数中的最后一个end，并正确缩进函数的主体和循环。

在这种情况下，错误消息会解释所有内容：

你不需要在Haml中使用“ - end”。不缩进以关闭块

更新您的HAML代码，这有效：

%h3
  = t("admin.labels.employee")
  = content_tag(:span, employee_counter)
- def create_validation_rules(field_rules)
  - Hash[field_rules.map do |rule|
    - next ["rule-#{rule[:name]}", rule[:value]] if rule[:value]
    - next ["msg-#{rule[:name]}", rule[:msg]] if rule[:msg]
  - end] if field_rules
.control-group.form-controls
  = f.label :first_name, t("labels.name")
  = f.text_field :first_name, placeholder: t("labels.first_name"), class: 'js-employeeName', id: "merchant_employees_attributes_#{index}_first_name", name: "merchant[employees_attributes][#{index}][first_name]", autocomplete: "off", maxlength: 50, size: nil, data: create_validation_rules(validations[:first_name])
  = f.text_field :middle_name, placeholder: t("labels.middle_name"), id: "merchant_employees_attributes_#{index}_middle_name", name: "merchant[employees_attributes][#{index}][middle_name]", autocomplete: "off", maxlength: 100, size: nil
  = f.text_field :last_name, placeholder: t("labels.last_name"), class: 'js-employeeName', id: "merchant_employees_attributes_#{index}_last_name", name: "merchant[employees_attributes][#{index}][last_name]", autocomplete: "off", maxlength: 50, size: nil, data: create_validation_rules(validations[:last_name])
.control-group
  = f.label :email, t("labels.email_address")
  = f.text_field :email, id: "merchant_employees_attributes_#{index}_email", name: "merchant[employees_attributes][#{index}][email]", autocomplete: "off", maxlength: 250, size: nil, data: create_validation_rules(validations[:email])
.control-group
  - if force_superuser_role
    = f.hidden_field :superuser, value: "1"
  - else
    = f.label :superuser, t("admin.labels.superuser")
    = f.check_box :superuser, class: "superuser_checkbox", id: "merchant_employees_attributes_#{index}_superuser", name: "merchant[employees_attributes][#{index}][superuser]"

由于ERB视图代码中嵌入的函数定义异常，http://htmltohaml.com没有很好地处理它，只是将整个方法重新调整为HAML输出。虽然这显然是不正确的，但纠正是一件简单的事情。

如果您是一名优秀的网民（并且您已经在使用该工具），您将向http://htmltohaml.com的开发人员报告此问题，以便他可以解释此类HAML生成问题。

Answer 2

最佳选择是将create_validation_rules移动到帮助程序中，或者至少将其设置为控制器中的helper_method。

要将其保留在haml中 - 您必须对块使用haml语法：

- def create_validation_rules(field_rules)
  - if field_rules
    - Hash.[] field_rules.map do |rule|
      - if rule[:value]
        - next ["rule-#{rule[:name]}", rule[:value]]
      - if rule[:msg]
        - next ["msg-#{rule[:name]}", rule[:msg]]

从ERB迁移到HAML后出错

2 个答案: