Joe Essey Joe Essey - 3 months ago 6
Ruby Question

Rails/Ruby - Prepopulate form with data passed from another page

How do I get values to prepopulate a new

device
form when navigating to it from
rfid
partial of
view/cabinet/show
page?
device
has_one
rfid
.

The link from cabinet/show:

<%= link_to "Create New Device (non-functional)", new_device_path({:id => @rfid.id, cabinet_id: @cabinet.id}), :class => "btn btn-primary" %>


The
devices_controller
, I want to have the create method work when either 0 or 2 params are passed:

def create(options)

if options[:cabinet_id] and options[:id]
@rfid = Rfid.find(params[:id])
@device = Device.new(params[:device])
@device.rfid = @rfid
@device.cabinet_id = :cabinet_id

else
@device = Device.new(params[:device])
@cabinet = Cabinet.find(params[:device][:cabinet_id])
@device.row_id = @cabinet.row_id
end
respond_to do |format|
if @device.save and @cabinet.refresh_capacity_used and @cabinet.refresh_consumption
format.html { redirect_to @device, notice: 'Device was successfully created.' }
format.json { render json: @device, status: :created, location: @device }
else
format.html { render action: "new" }
format.json { render json: @device.errors, status: :unprocessable_entity }
end
end


end

The cabinet_id and rfid portion of new
device/_form
:

<tr>
<th>Cabinet</th>
<td><%= f.select :cabinet_id, options_from_collection_for_select(Cabinet.order(:name).all, "id", "name", @device.cabinet_id) %></td>
</tr>


<tr>
<th>RFID</th>
<td><%= f.text_field :rfid, :value => params[:rfid]%></td>
</tr>


Thank you.

Answer

If you have:

<%= link_to "Create New Device (non-functional)", new_device_path({:id => @rfid.id, :cabinet_id => @cabinet.id}), :class => "btn btn-primary" %>

you can get prepopulate the rfid and cabinet_id fields using:

<%= f.select :cabinet_id, options_from_collection_for_select(Cabinet.order(:name).all, "id", "name", params[:cabinet_id]) %>

<%= f.text_field :rfid, :value => params[:id] %>

Note that your params key must match the value passed into the hash in your link_to tag.