Rails - Is there a way to update a single attribute?

Question

I was just wondering, I have a model that, besides the id's from other models (FK), it has a single attribute boolean. I want to know how can I create a button that changes this boolean and just that

My model in question is this one:

class Squad
 belongs_to :player
 belongs_to :team
end

I want to create a button on the team#show page so the player that owns this team can change the boolean of squad. How can I do this and how would look like my controllers?

Thanks :)!

-Edit-

I'm using a link like this:

<%=link_to("Change status", squad_path(sqd, :status => true), :method => :put, :confirm => "Sure?")%>

Where sqd is part of my query. Is this link wrong?

Solution 1

<%= link_to("Change status", squad_path(sqd, "squad[status]" => true), :method => :put, :confirm => "Sure?") %>

in your controller (it is pretty common)

def update
  @squad = Squad.find params[:id]
  if @squad.update_attributes params[:squad]
    ...
  end
end

Solution 2

Yes there is. The method is called "update_attribute". It takes two arguments, the name of the field and the value.

  squad.update_attribute(:boolean_field,true) # or false

Based on updated question

def update
  @squad = Squad.find(params[:id])
  if @squad.update_attribute(:status,params[:status])
    ...
  end
end

Comments

[Samth]

Thanks for the answer :). I'm trying to create a link to it but isn't working, its updating all the models in the page :/ I have a query to find the squads in question, do you think this is the best way or there is other possible thing I could do?

[Samth]

Thanks for the answer. I edited my question. Could you change the link my link into the one you proposed? :)

[Samth]

Thanks! That was the missing part :)

[fl00r]

@Aditya Sanghi, yes, it is just a mistype of course and it is not the point of the answer

[Aditya Sanghi]

I thought the point of the question was how to update a single attribute on a model not multiple. Regardless glad that the poster got the solution. :) cheers

[undefinedvariable]

@fl00r's answer helped me figure out my error. I did it without the method in the controller though. <% boolval_state = modelname.boolval ? "Y" : "N"; boolval_flip = modelname.boolval ? false : true; %> <%= link_to boolval_state, modelname_path(modelname, "modelname[boolval]" => boolval_flip), method: :put %>