I am a rails beginner,now I follow the guide and create a test project as below:
admin_controller.rb
def blogEdit
@btnName = "更新"
@submitURL = "blogUpdate"
@blog=Blog.find(params[:id])
end
def blogUpdate
@blog=Blog.find(params[:id])
@blog.update(params[:blog])
redirect_to "/admin/blogList"
end
blogEdit.slim
= render "blogForm"
_blogForm.slim
=form_for :blog,url:{action: @submitURL} do |f|
=f.label :title ,"标题"
=f.text_field :title
=f.label :body ,"内容"
=f.text_area :body,rows:10,style:'width:500px;'
=f.label :author ,"作者"
=f.text_field :author
=f.hidden_field :id
=f.submit @btnName,class:'btn'
but when I update a blog,I get the error:
Couldn't find Blog without an ID
Rails.root: /home/hxh/share/ruby/myblog
Application Trace | Framework Trace | Full Trace
app/controllers/admin_controller.rb:28:in `blogUpdate'
Request
Parameters:
{"utf8"=>"✓",
"authenticity_token"=>"3SBp+xSft8SzA5poczxNSU1zKReO2OpZQqgESn6ZURs=",
"blog"=>{"title"=>"违法的",
"body"=>"的说法都是",
"author"=>"似懂非懂",
"id"=>"2"},
"commit"=>"更新"}
so It shows that I not get the params[:id]
@blog=Blog.find(params[:id])
I had follow the guide,why I got the result?
You're passing =f.hidden_field :id into form. So your id in in params[:blog][:id]. But id have to be passing via @submitURL. Judging by your params @submitUrl aren't contains id of the blog.
You are not following guide convensions or your guide doesn't do it. Because there is common rules for name actions. It's edit and update instead your blogEdit and blogUpdate.
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