我一直在尝试允许用户输入活动名称,然后将其保存到数据库中。但是,我遇到了多个问题
第一个是以下内容:
ActionController :: Activity Controller中的参数#创建
及其所指的行是以下内容:
params.require(:Actives).permit(:a_name)
我已经看过一些解决方案,据我了解,它源于该行的" require(::活动)"部分。我不明白的是为什么要拥有该特定行会导致错误。
删除" .remove(:Active)"将修复它,但我遇到了另一个问题,当我输入名称然后单击"创建"按钮时,它认为我没有名称并抛出验证错误。
验证失败:名称不能为空白,名称太短(最小值) 是1个字符)
及其所指的线:
如果 @acvision.save!
这使我相信" form_for"的代码是不正确的,并且不会将文本字段中的内容视为名称的输入。我仍然是HTML和Ruby在Rails上的新手,所以有人可以看到我在做错什么吗?谢谢!
活动模型:
class Activity < ApplicationRecord
validates :a_name, presence: true, length: {minimum: 1}
end
活动控制器:
class ActivitiesController < ApplicationController
def display
@activities = Activity.all
end
def index
@activities = Activity.all
end
def show
end
def new
@activities = Activity.new
end
def create
@activities = Activity.create(activities_params)
if @activities.save!
flash[:success] = 'Activity created successfully!'
redirect_to activities_display_path
else
flash[:error] = 'ERROR: Activity was not saved!'
#render_to_string #normally would have it render to the name of view ex: :new
end
end
def edit
@activities = Activity.find(params[:id])
end
def update
@activities = Activity.update(activities_params)
if @activities.save!
flash[:success] = 'Activity successfully updated!'
redirect_to root
else
flash[:error] = 'ERROR: Activity failed to update'
render_to_string
end
end
private
def activities_params
params.require(:activities).permit(:a_name)
end
end
活动新HTML:
<body>
<% flash.each do |key, value| %>
<div class="alert alert-<%= key %>"><%= value %></div>
<% end %>
<%= form_for @activities do |a| %>
<div class = "form-group">
<div class = "row top-buffer text-center">
<div class='col-md-3'>
<%= a.label :a_name, 'Activity Name' %>:
<%= a.text_field :a_name %>
</div>
</div>
<div class ="row top-buffer text-center">
<div class="col-md-3">
<%= a.submit 'Create', class: 'btn btn-primary'%>
</div>
</div>
</div>
<% end %>
</body>
正如Max所说,我的错误是认为参数是"活动[a_name]",而不是"活动[a_name]"。
更改
params.require(:activities).permit(:a_name)
to
params.require(:activity).permit(:a_name)
修复了第一个错误,随后允许我保存用户输入。感谢您的帮助最大