If I read correctly, you only need to change default value depending on some
conditions. You can do that in do_new in controller, instead of adding a form
helper:
def do_new
super
if params[:widgetmodel_id] #Form invoked from WidgetModel list. (create new
from nested view)
widgetmodel = Widjetmodel.find(params[:widgetmodel_id])
@record.rtype = widgetmodel.rtype
@record.widgettype = widgetmodel.widgettype
end
end
El Miércoles, 15 de abril de 2015 15:33:07 coalex escribió:
> Sometimes I need a set a few form columns to a certain value based on where
> the form is invoked in the application (if nested, if with associations,
> etc.), otherwise the form colums should function as normal(if no conditions
> exist) as send_form_on_update_column. I'm having trouble doing both.
> I need advice on writing the helper cleanly.
>
> Example:
> Model: widget.rb
> belongs_to :rtype
> belongs_to :widgettype
> belongs_to :widgetmodel
>
> Controller: widget_controller.rb
>
> active_scaffold :"widget" do |conf|
> …
> conf.columns[:rtype].label = "Entity"
> conf.columns[:rtype].form_ui = :select #example: “Software”
> conf.columns[:rtype].update_columns = :widgettype
> conf.columns[:rtype].send_form_on_update_column = true
> …
> conf.columns[:widgettype].label = "Type"
> conf.columns[widgettype].form_ui = :select #example: “Audio Editing Suites”
> conf.columns[widgettype].update_columns = [:widgetmodel]
> conf.columns[widgettype].send_form_on_update_column = true
> …
> conf.columns[:widgetmodel].label = "Model"
> conf.columns[:widgetmodel].form_ui = :select #example: “Audacity 2.1.0”
>
>
> \\widget_helper.rb
> …
>
> def rtype_form_column(record, options)
>
> columns = [ 'name', 'id'] # Rtype's name for the selection box.
> list = Rtype.find :all,
>
> :select => columns.join(', '),
> :order => 'name'
>
> @rtypes = list.map{|r|[r.name, r.id]}
>
> if params[:widgetmodel_id] #Form invoked from WidgetModel list. (create new
> from nested view)
>
> widgetmodel = Widjetmodel.find(params[:widgetmodel_id])
>
> select(:record, :rtype, @rtypes, :selected =>
> assetmodel.rtype_id,:include_blank => true)
>
> elsif @record.rtype #Form invoked where record.rtype is already
> assigned.(an update)
>
> select(:record, :rtype, @rtypes, :selected =>
> @record.rtype_id,:include_blank => true)
>
> else #If no conditions exist.(create new)
>
> #Behave normally...Forget this form_helper exists.
> *#What goes here?*
>
> end
> end
>
> --Likewise
>
> def widgettype_form_column(record, options)
> columns = [ 'name', 'id'] # add the rest you need
> here
>
> list = Widgettype.find :all,
>
> :select => columns.join(', '),
> :order => 'name' # maybe some sql to limit it here -
>
> not sure
>
> @widgettypes = list.map{|r|[r.name, r.id]}
>
> if params[:widgetmodel_id] #Form invoked from WidgetModel list. (nested
> view)
> widgetmodel = widgetmodel.find(params[:widgetmodel_id])
>
> select(:record, :widgettype, @widgettypes, :selected =>
> widgetmodel.widgettype_id,:include_blank => true)
>
> elsif @record.widgettype #Form invoked where record.widgettype already
> exist (an update)
>
> select(:record, :widgettype, @widgettypes, :selected =>
> @record.widgettype_id,:include_blank => true)
>
> else #Forget this form_helper exists.
> * #What goes here?*
> end
>
> end
>
> Any thoughts would be greatly appreciated!
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