无法在 Rails 5.0 的 ApplicationHelper 方法中使用 "number_with_precision"
Not able to use "number_with_precision" in ApplicationHelper's method in Rails 5.0
我在 Rails 视图中使用 "number_with_precision" 方法,它在那里工作正常,例如:
在 Rails 视图中:(工作正常)
<%= number_with_precision(job.company.rating, :precision => 2) %>
但是,当我尝试在 ApplicationHelper 的方法中执行相同操作时,出现以下错误:
undefined method `number_with_precision' rails
这是我尝试过的:
在RailsApplicationHelper:(报错)
module ApplicationHelper
def employer_overall_rating(overall_rating)
@overall_rating = number_with_precision(overall_rating, :precision => 2)
end
end
如何在 ApplicationHelper 中使用它?
尝试关注
module ApplicationHelper
include ActionView::Helpers::NumberHelper
def employer_overall_rating(overall_rating)
@overall_rating = number_with_precision(overall_rating, :precision => 2)
end
end
如果您不想让命名空间与数字助手混淆,一种方法是通过 ActionController::Base.helpers
.
调用助手
def employer_overall_rating(overall_rating)
@overall_rating = ActionController::Base.helpers.number_with_precision(overall_rating, :precision => 2)
end
自然可以通过以下方式简化:
def helpers
ActionController::Base.helpers
end
那你就可以helpers.number_with_precision
另一种方法是包含 ActionView::Helpers::NumberHelper
include ActionView::Helpers::NumberHelper
在你的 application_helper.rb
我在 Rails 视图中使用 "number_with_precision" 方法,它在那里工作正常,例如:
在 Rails 视图中:(工作正常)
<%= number_with_precision(job.company.rating, :precision => 2) %>
但是,当我尝试在 ApplicationHelper 的方法中执行相同操作时,出现以下错误:
undefined method `number_with_precision' rails
这是我尝试过的:
在RailsApplicationHelper:(报错)
module ApplicationHelper
def employer_overall_rating(overall_rating)
@overall_rating = number_with_precision(overall_rating, :precision => 2)
end
end
如何在 ApplicationHelper 中使用它?
尝试关注
module ApplicationHelper
include ActionView::Helpers::NumberHelper
def employer_overall_rating(overall_rating)
@overall_rating = number_with_precision(overall_rating, :precision => 2)
end
end
如果您不想让命名空间与数字助手混淆,一种方法是通过 ActionController::Base.helpers
.
def employer_overall_rating(overall_rating)
@overall_rating = ActionController::Base.helpers.number_with_precision(overall_rating, :precision => 2)
end
自然可以通过以下方式简化:
def helpers
ActionController::Base.helpers
end
那你就可以helpers.number_with_precision
另一种方法是包含 ActionView::Helpers::NumberHelper
include ActionView::Helpers::NumberHelper
在你的 application_helper.rb