Base handler, from which all the other handlers are derived. It creates a common interface to create consistency amongst handlers and data.

This class would be abstract in PHP5, but PHP4 doesn't understand that.

Definition terms:

  • table: The actual table this uses; only specify if different from the table this is attached to.
  • real field: The actual field this uses; only specify if different from the field this item is attached to.
  • group: A text string representing the 'group' this item is attached to, for display in the UI. Examples: "Node", "Taxonomy", "Comment", "User", etc. This may be inherited from the parent definition or the 'table' definition.
  • title: The title for this handler in the UI. This may be inherited from the parent definition or the 'table' definition.
  • help: A more informative string to give to the user to explain what this field/handler is or does.
  • access callback: If this field should have access control, this could be a function to use. 'user_access' is a common function to use here. If not specified, no access control is provided.
  • access arguments: An array of arguments for the access callback.

Hierarchy

Expanded class hierarchy of views_handler

File

modules/views/includes/handlers.inc, line 33
Defines the various handler objects to help build and display views.

Members

Contains filters are case sensitive
Namesort descending Modifiers Type Description
views_handler::$table public property The Views name of the table on which this handler effects.
views_handler::$table_alias public property The alias of the table of this handler which is used in the query.
views_handler::accept_exposed_input function Take input from exposed handlers and assign to this handler, if necessary.
views_handler::access function Check whether current user has access to this handler.
views_handler::admin_summary function Provide text for the administrative summary
views_handler::broken function Determine if the handler is considered 'broken', meaning it's a a placeholder used when a handler can't be found.
views_handler::can_expose function Determine if a handler can be exposed.
views_handler::case_transform function Transform a string by a certain method.
views_handler::ensure_my_table function Ensure the main table for this handler is in the query. This is used a lot.
views_handler::exposed_form function Render our chunk of the exposed handler form when selecting
views_handler::exposed_info function Get information about the exposed form for the form renderer.
views_handler::exposed_submit function Submit the exposed handler form
views_handler::exposed_validate function Validate the exposed handler form
views_handler::expose_form function Form for exposed handler options.
views_handler::expose_options function Set new exposed option defaults when exposed setting is flipped on.
views_handler::expose_submit function Perform any necessary changes to the form exposes prior to storage. There is no need for this function to actually store the data.
views_handler::expose_validate function Validate the options form.
views_handler::extra_options function Provide defaults for the handler.
views_handler::extra_options_form function Provide a form for setting options.
views_handler::extra_options_submit function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
views_handler::extra_options_validate function Validate the options form.
views_handler::get_field function Shortcut to get a handler's raw field value.
views_handler::get_join function Get the join object that should be used for this handler.
views_handler::groupby_form function Provide a form for aggregation settings.
views_handler::groupby_form_submit function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
views_handler::has_extra_options function If a handler has 'extra options' it will get a little settings widget and another form called extra_options.
views_handler::init function init the handler with necessary data.
views_handler::is_a_group function Returns TRUE if the exposed filter works like a grouped filter.
views_handler::is_exposed function Determine if this item is 'exposed', meaning it provides form elements to let users modify the view.
views_handler::multiple_exposed_input function Define if the exposed input has to be submitted multiple times. This is TRUE when exposed filters grouped are using checkboxes as widgets.
views_handler::needs_style_plugin function Determine if the argument needs a style plugin.
views_handler::option_definition function Information about options for all kinds of purposes will be held here. @code 'option_name' => array( Overrides views_object::option_definition
views_handler::options_form function Build the options form.
views_handler::options_submit function Perform any necessary changes to the form values prior to storage. There is no need for this function to actually store the data.
views_handler::options_validate function Validate the options form.
views_handler::placeholder function Provides a unique placeholders for handlers.
views_handler::post_execute function Run after the view is executed, before the result is cached.
views_handler::pre_query function Run before the view is built.
views_handler::sanitize_value function Sanitize the value for output.
views_handler::set_relationship function Called just prior to query(), this lets a handler set up any relationship it needs.
views_handler::show_expose_button function Shortcut to display the expose/hide button.
views_handler::show_expose_form function Shortcut to display the exposed options form.
views_handler::store_exposed_input function If set to remember exposed input in the session, store it there.
views_handler::ui_name function Return a string representing this handler's name in the UI.
views_handler::use_group_by function Provides the handler some groupby.
views_handler::validate function Validates the handler against the complete View.
views_object::construct function Views handlers use a special construct function so that we can more easily construct them with variable arguments.
views_object::destroy function
views_object::options Deprecated function Set default options on this object. Called by the constructor in a complex chain to deal with backward compatibility.
views_object::set_default_options function Set default options. For backward compatibility, it sends the options array; this is a feature that will likely disappear at some point.
views_object::set_definition function Let the handler know what its full definition is.
views_object::_set_option_defaults function
views_object::unpack_options function Unpack options over our existing defaults, drilling down into arrays so that defaults don't get totally blown away.
views_object::unpack_translatable public function Unpack a single option definition.
views_object::unpack_translatables public function Unpacks each handler to store translatable texts.