Update Column Action Flow

Action 'render_field' (GET request)

In-place editing usually displays a form using JS, but if :ajax is set in inplace_edit, it will use this action with GET request to render the form for in-place edit, which will call these methods in the following order:

1. render_field
   1. render_field_for_inplace_editing.
      1. It sets @column with the column being updated.
      2. It loads the record into @record instance variable, which uses find_if_allowed to load it.
         1. find_if_allowed is called to load the record, checking permission with :update and column's name.

Then it will render the following view:

1. render_field_inplace.html.erb is rendered to return the html field for the column

Action 'update_column'

When form is submitted, these methods are called in the following order:

1. update_column
   1. do_update_column.
      1. It sets @column with the column being updated
      2. record_for_update_column is called to load the record into @record instance variable, which uses find_if_allowed to load it
         1. find_if_allowed is called to load the record, checking :read permission.
         2. It checks permission for :update and column's name, and stops the action if not allowed, but don't return 404 error.
      3. value_for_update_column to convert the submitted value to ruby object, with the same methods used internally by create and update actions.
      4. before_update_save will be called, after setting the value, before saving.
      5. If record is saved successfully and inplace_edit_update is set in the column, it will call one of these methods:
         • do_list if inplace_edit_update is :table.
         • get_row if inplace_edit_update is not :table but has value.
      6. after_update_save is called after saving the record

Then it will render the following view and partials:

1. update_column.js.erb is rendered to refresh the table, row, columns set in update_columns or the column being edited, depending on the value of inplace_edit_update.
   1. renders _update_messages.js.erb if updating failed
   2. depending on the value of inplace_edit_update renders:
      • if it's :row renders _row partial to refresh the row.
      • if it's :table renders _list partial to refresh the list table.
      • otherwise, updates the column, and renders _update_columns.js.erb if it's :columns and update_columns is set.
   3. If the column has calculation enabled, it will update the column calculation too.