I am new to ruby on rails. I checked online and on many tutorials but
I can’t find an answer to my problem 
As an exercise I am creating a weblog
I am using a simple form to add a new “page” to my weblog
Form code:
<%= error_messages_for ‘page’ %>
Title
<%= text_field 'page', 'title' %>
Created at
<%= datetime_select 'page', 'created_at' %>
Content
<%= text_area 'page', 'content' %>
and in the controller I use
@page = Page.new(params[:page])
It works but I need to modify the parameters I am sending to Page.new()
I know I can’t modify :page as it is a Symbol.
But how can I access the values contained inside :page?
I have tried b = eval(:a.id2name) to get the variable’s contents but
id does not work.
Any idea?
Aurélien Bottazini wrote:
I am new to ruby on rails. I checked online and on many tutorials but
I can’t find an answer to my problem 
As an exercise I am creating a weblog
I am using a simple form to add a new “page” to my weblog
Form code:
<%= error_messages_for ‘page’ %>
Title
<%= text_field 'page', 'title' %>
Created at
<%= datetime_select 'page', 'created_at' %>
Content
<%= text_area 'page', 'content' %>
and in the controller I use
@page = Page.new(params[:page])
It works but I need to modify the parameters I am sending to Page.new()
I know I can’t modify :page as it is a Symbol.
But how can I access the values contained inside :page?
I have tried b = eval(:a.id2name) to get the variable’s contents but
id does not work.
Any idea?
You can use either:
params[:page][:content]
if you wanted to edit the values before putting it into the Page object
or
@page.content
If you want to work on the object after initialising it.
Another thing I just spotted is your use of created_at here…
Created at
<%= datetime_select 'page', 'created_at' %>
created_at is automatically set by rails when the @page object is
created. updated_at, its companion, keeps track of when the object was
last saved after modification.
Gustav P.
Woops!
params isn’t necessarily a hash of hashes, the insertwidget_tag helpers
for instance aren’t mapped that way…
<%=text_field_tag :name%>
will get passed to the controller as:
params[:name]
Ciao
Gustav P.
Aurélien Bottazini wrote:
and in the controller I use
Any idea?
Hey
The params hash is a hash of hashes… ie
irb(main):010:0> params = {:page => {:foo => “bar”}}
=> {:page=>{:foo=>“bar”}}
irb(main):011:0> params[:page][:foo]
=> “bar”
irb(main):012:0> params[:page][:foo] = “diff”
=> “diff”
irb(main):013:0> params[:page][:foo]
=> “diff”
So in your example you could say:
…
params[:page][:title] = “Auto Title”
@page = Page.new(params[:page])
…
Goodluck,
Gustav P.
Thank you to both of you.
It works perfectly now.
Another thing I just spotted is your use of created_at here…
Created at
<%= datetime_select 'page', 'created_at' %>
created_at is automatically set by rails when the @page object is
created. updated_at, its companion, keeps track of when the object was
last saved after modification.
Gustav P.
I used scaffold to generate the code initially. But your right
created_at is automatically set by rails.
I am going to remove it from the form 
Hi Aurélien,
It works but I need to modify the parameters I am sending to Page.new()
I know I can’t modify :page as it is a Symbol.
But how can I access the values contained inside :page?
title = params[:page][:title]
content = params[:page][:content]
and so on…
РJean-Fran̤ois.
–
À la renverse.
