- Introduction
- Configuring the list behavior
- Defining list columns
- Available column types
- Displaying the list
- Multiple list definitions
- Using list filters
- Extending list behavior
List behavior is a controller modifier used for easily adding a record list to a page. The behavior provides the sortable and searchable list with optional links on its records. The behavior provides the controller action index however the list can be rendered anywhere and multiple list definitions can be used.
List behavior depends on list column definitions and a model class. In order to use the list behavior you should add it to the $implement property of the controller class. Also, the $listConfig class property should be defined and its value should refer to the YAML file used for configuring the behavior options.
namespace Acme\Blog\Controllers;
class Categories extends \Backend\Classes\Controller
{
public $implement = ['Backend.Behaviors.ListController'];
public $listConfig = 'list_config.yaml';
}
Note: Very often the list and form behavior are used together in a same controller.
The configuration file referred in the $listConfig property is defined in YAML format. The file should be placed into the controller's views directory. Below is an example of a typical list behavior configuration file:
# ===================================
# List Behavior Config
# ===================================
title: Blog Posts
list: ~/plugins/acme/blog/models/post/columns.yaml
modelClass: Acme\Blog\Models\Post
recordUrl: acme/blog/posts/update/:id
The following fields are required in the list configuration file:
| Field | Description |
|---|---|
| title | a title for this list. |
| list | a configuration array or reference to a list column definition file, see list columns. |
| modelClass | a model class name, the list data is loaded from this model. |
The configuration options listed below are optional.
| Option | Description |
|---|---|
| filter | filter configuration, see filtering the list. |
| recordUrl | link each list record to another page. Eg: users/update:id. The :id part is replaced with the record identifier. This allows you to link the list behavior and the form behavior. |
| recordOnClick | custom JavaScript code to execute when clicking on a record. |
| noRecordsMessage | a message to display when no records are found, can refer to a localization string. |
| recordsPerPage | records to display per page, use 0 for no pages. Default: 0 |
| showPageNumbers | displays page numbers with pagination. Disable this to improve list performance when working with large tables. Default: true |
| toolbar | reference to a Toolbar Widget configuration file, or an array with configuration (see below). |
| showSorting | displays the sorting link on each column. Default: true |
| defaultSort | sets a default sorting column and direction when user preference is not defined. Supports a string or an array with keys column and direction. |
| showCheckboxes | displays checkboxes next to each record. Default: false. |
| showSetup | displays the list column set up button. Default: false. |
| showTree | displays a tree hierarchy for parent/child records. Default: false. |
| treeExpanded | if tree nodes should be expanded by default. Default: false. |
| customViewPath | specify a custom view path to override partials used by the list, optional. |
To include a toolbar with the list, add the following configuration to the list configuration YAML file:
toolbar:
buttons: list_toolbar
search:
prompt: Find records
The toolbar configuration allows:
| Option | Description |
|---|---|
| buttons | a reference to a controller partial file with the toolbar buttons. Eg: _list_toolbar.htm |
| search | reference to a Search Widget configuration file, or an array with configuration. |
The search configuration supports the following options:
| Option | Description |
|---|---|
| prompt | a placeholder to display when there is no active search, can refer to a localization string. |
| mode | defines the search strategy to either contain all words, any word or exact phrase. Supported options: all, any, exact. Default: all. |
| scope | specifies a query scope method defined in the list model to apply to the search query, the first argument will contain the search term. |
The toolbar buttons partial referred above should contain the toolbar control definition with some buttons. The partial could also contain a scoreboard control with charts. Example of a toolbar partial with the New Post button referring to the create action provided by the form behavior:
<div data-control="toolbar">
<a
href="<?= Backend::url('acme/blog/posts/create') ?>"
class="btn btn-primary oc-icon-plus">New Post</a>
</div>
To filter a list by user defined input, add the following list configuration to the YAML file:
filter: config_filter.yaml
The filter option should make reference to a filter configuration file path or supply an array with the configuration.
List columns are defined with the YAML file. The column configuration is used by the list behavior for creating the record table and displaying model columns in the table cells. The file is placed to a subdirectory of the models directory of a plugin. The subdirectory name matches the model class name written in lowercase. The file name doesn't matter, but the columns.yaml and list_columns.yaml are common names. Example list columns file location:
plugins/
acme/
blog/
models/ <=== Plugin models directory
post/ <=== Model configuration directory
list_columns.yaml <=== Model list columns config file
Post.php <=== model class
The next example shows the typical contents of a list column definitions file.
# ===================================
# List Column Definitions
# ===================================
columns:
name: Name
email: Email
For each column can specify these options (where applicable):
| Option | Description |
|---|---|
| label | a name when displaying the list column to the user. |
| type | defines how this column should be rendered (see Column types below). |
| default | specifies the default value for the column if value is empty. |
| searchable | include this column in the list search results. Default: false. |
| invisible | specifies if this column is hidden by default. Default: false. |
| sortable | specifies if this column can be sorted. Default: true. |
| clickable | if set to false, disables the default click behavior when the column is clicked. Default: true. |
| select | defines a custom SQL select statement to use for the value. |
| valueFrom | defines a model attribute to use for the value. |
| relation | defines a model relationship column. |
| cssClass | assigns a CSS class to the column container. |
| width | sets the column width, can be specified in percents (10%) or pixels (50px). There could be a single column without width specified, it will be stretched to take the available space. |
There are various column types that can be used for the type setting, these control how the list column is displayed. In addition to the native column types specified below, you may also define custom column types.
<style> .collection-method-list { column-count: 3; -moz-column-count: 3; -webkit-column-count: 3; column-gap: 2em; -moz-column-gap: 2em; -webkit-column-gap: 2em; } .collection-method-list a { display: block; } </style>text - displays a text column, aligned left
full_name:
label: Full Name
type: text
number - displays a number column, aligned right
age:
label: Age
type: number
switch - displays a on or off state for boolean columns.
enabled:
label: Enabled
type: switch
datetime - displays the column value as a formatted date and time. The next example displays dates as Thu, Dec 25, 1975 2:15 PM.
created_at:
label: Date
type: datetime
# Display datetime exactly as it is stored, ignores October's and the backend user's specified timezones.
ignoreTimezone: true
You can also specify a custom date format, for example Thursday 25th of December 1975 02:15:16 PM:
created_at:
label: Date
type: datetime
format: l jS \of F Y h:i:s A
date - displays the column value as date format M j, Y
created_at:
label: Date
type: date
# Display datetime exactly as it is stored, ignores October's and the backend user's specified timezones.
ignoreTimezone: true
time - displays the column value as time format g:i A
created_at:
label: Date
type: time
# Display datetime exactly as it is stored, ignores October's and the backend user's specified timezones.
ignoreTimezone: true
timesince - displays a human readable time difference from the value to the current time. Eg: 10 minutes ago
created_at:
label: Date
type: timesince
# Display datetime exactly as it is stored, ignores October's and the backend user's specified timezones.
ignoreTimezone: true
timetense - displays 24-hour time and the day using the grammatical tense of the current date. Eg: Today at 12:49, Yesterday at 4:00 or 18 Sep 2015 at 14:33.
created_at:
label: Date
type: timetense
# Display datetime exactly as it is stored, ignores October's and the backend user's specified timezones.
ignoreTimezone: true
select - allows to create a column using a custom select statement. Any valid SQL SELECT statement works here.
full_name:
label: Full Name
select: concat(first_name, ' ', last_name)
relation - allows to display related columns, you can provide a relationship option. The value of this option has to be the name of the Active Record relationship on your model. In the next example the name value will be translated to the name attribute found in the related model (eg: $model->name).
group:
label: Group
relation: groups
select: name
If the relationship definition uses the count argument, you can display the number of related records using the valueFrom and default options.
users_count:
label: Users
relation: users_count
valueFrom: count
default: 0
Note: Using the
relationoption on a column will load the value from theselected column into the attribute specified by this column. It is recommended that you name the column displaying the relation data without conflicting with existing model attributes as demonstrated in the examples below:
Best Practice:
group_name:
label: Group
relation: group
select: name
Poor Practice:
# This will overwrite the value of $record->group_id which will break accessing relations from the list view
group_id:
label: Group
relation: group
select: name
partial - renders a partial, the path value can refer to a partial view file otherwise the column name is used as the partial name. Inside the partial these variables are available: $value is the default cell value, $record is the model used for the cell and $column is the configured class object Backend\Classes\ListColumn.
content:
type: partial
path: ~/plugins/acme/blog/models/comments/_content_column.htm
Usually lists are displayed in the index view file. Since lists include the toolbar, the view file will consist solely of the single listRender method call.
<?= $this->listRender() ?>
The list behavior can support mulitple lists in the same controller using named definitions. The $listConfig property can be defined as an array where the key is a definition name and the value is the configuration file.
public $listConfig = [
'templates' => 'config_templates_list.yaml',
'layouts' => 'config_layouts_list.yaml'
];
Each definition can then be displayed by passing the definition name as the first argument when calling the listRender method:
<?= $this->listRender('templates') ?>
Lists can be filtered by adding a filter definition to the list configuration. Similarly filters are driven by their own configuration file that contain filter scopes, each scope is an aspect by which the list can be filtered. The next example shows a typical contents of the filter definition file.
# ===================================
# Filter Scope Definitions
# ===================================
scopes:
category:
label: Category
modelClass: Acme\Blog\Models\Category
conditions: category_id in (:filtered)
nameFrom: name
status:
label: Status
type: group
conditions: status in (:filtered)
options:
pending: Pending
active: Active
closed: Closed
published:
label: Hide published
type: checkbox
default: 1
conditions: is_published <> true
approved:
label: Approved
type: switch
default: 2
conditions:
- is_approved <> true
- is_approved = true
created_at:
label: Date
type: date
conditions: created_at >= ':filtered'
published_at:
label: Date
type: daterange
conditions: created_at >= ':after' AND created_at <= ':before'
For each scope you can specify these options (where applicable):
| Option | Description |
|---|---|
| label | a name when displaying the filter scope to the user. |
| type | defines how this scope should be rendered (see Scope types below). Default: group. |
| conditions | specifies a raw where query statement to apply to the list model query, the :filtered parameter represents the filtered value(s). |
| scope | specifies a query scope method defined in the list model to apply to the list query, the first argument will contain the filtered value(s). |
| options | options to use if filtering by multiple items, this option can specify an array or a method name in the modelClass model. |
| nameFrom | if filtering by multiple items, the attribute to display for the name, taken from all records of the modelClass model. |
| default | can either be integer(switch,checkbox,number) or array(group,date range,number range) or string(date). |
These types can be used to determine how the filter scope should be displayed.
<style> .collection-method-list { column-count: 3; -moz-column-count: 3; -webkit-column-count: 3; column-gap: 2em; -moz-column-gap: 2em; -webkit-column-gap: 2em; } .collection-method-list a { display: block; } </style>group - filters the list by a group of items, usually by a related model and requires a nameFrom or options definition. Eg: Status name as open, closed, etc.
status:
label: Status
type: group
conditions: status in (:filtered)
default:
pending: Pending
active: Active
options:
pending: Pending
active: Active
closed: Closed
checkbox - used as a binary checkbox to apply a predefined condition or query to the list, either on or off. Use 0 for off and 1 for on for default value
published:
label: Hide published
type: checkbox
default: 1
conditions: is_published <> true
switch - used as a switch to toggle between two predefined conditions or queries to the list, either indeterminate, on or off. Use 0 for off, 1 for indeterminate and 2 for on for default value
approved:
label: Approved
type: switch
default: 1
conditions:
- is_approved <> true
- is_approved = true
date - displays a date picker for a single date to be selected.
created_at:
label: Date
type: date
minDate: '2001-01-23'
maxDate: '2030-10-13'
yearRange: 10
conditions: created_at >= ':filtered'
daterange - displays a date picker for two dates to be selected as a date range. The conditions parameters are passed as :before and :after.
published_at:
label: Date
type: daterange
minDate: '2001-01-23'
maxDate: '2030-10-13'
yearRange: 10
conditions: created_at >= ':after' AND created_at <= ':before'
To use default value for Date and Date Range
myController::extendListFilterScopes(function($filter) {
'Date Test' => [
'label' => 'Date Test',
'type' => 'daterange',
'default' => $this->myDefaultTime(),
'conditions' => "created_at >= ':after' AND created_at <= ':before'"
],
]);
});
// return value must be instance of carbon
public function myDefaultTime() {
return [
0 => Carbon::parse('2012-02-02'),
1 => Carbon::parse('2012-04-02'),
];
}number - displays input for a single number to be entered.
age:
label: Age
type: number
default: 14
conditions: age >= ':filtered'
numberrange - displays inputs for two numbers to be entered as a number range. The conditions parameters are passed as :min and :max.
visitors:
label: Visitor Count
type: numberrange
default:
0:10
1:20
conditions: vistors >= ':min' and visitors <= ':max'
text - display text input for a string to be entered. You can specify a size attribute that will be injected in the input size attribute (default: 10).
username:
label: Username
type: text
conditions: username = :value
size: 2
Sometimes you may wish to modify the default list behavior and there are several ways you can do this.
- Overriding controller action
- Overriding views
- Extending column definitions
- Extending filter scopes
- Extending the model query
- Custom column types
You can use your own logic for the index action method in the controller, then optionally call the List behavior index parent method.
public function index()
{
//
// Do any custom code here
//
// Call the ListController behavior index() method
$this->asExtension('ListController')->index();
}
The ListController behavior has a main container view that you may override by creating a special file named _list_container.htm in your controller directory. The following example will add a sidebar to the list:
<?php if ($toolbar): ?>
<?= $toolbar->render() ?>
<?php endif ?>
<?php if ($filter): ?>
<?= $filter->render() ?>
<?php endif ?>
<div class="row row-flush">
<div class="col-sm-3">
[Insert sidebar here]
</div>
<div class="col-sm-9 list-with-sidebar">
<?= $list->render() ?>
</div>
</div>
The behavior will invoke a Lists widget that also contains numerous views that you may override. This is possible by specifying a customViewPath option as described in the list configuration options. The widget will look in this path for a view first, then fall back to the default location.
# Custom view path
customViewPath: $/acme/blog/controllers/reviews/list
Note: It is a good idea to use a sub-directory, for example
list, to avoid conflicts.
For example, to modify the list body row markup, create a file called list/_list_body_row.htm in your controller directory.
<tr>
<?php foreach ($columns as $key => $column): ?>
<td><?= $this->getColumnValue($record, $column) ?></td>
<?php endforeach ?>
</tr>
You can extend the columns of another controller from outside by calling the extendListColumns static method on the controller class. This method can take two arguments, $list will represent the Lists widget object and $model represents the model used by the list. Take this controller for example:
class Categories extends \Backend\Classes\Controller
{
public $implement = ['Backend.Behaviors.ListController'];
public $listConfig = 'list_config.yaml';
}
Using the extendListColumns method you can add extra columns to any list rendered by this controller. It is a good idea to check the $model is of the correct type. Here is an example:
Categories::extendListColumns(function($list, $model) {
if (!$model instanceof MyModel)
return;
$list->addColumns([
'my_column' => [
'label' => 'My Column'
]
]);
});
You can also extend the list columns internally by overriding the listExtendColumns method inside the controller class.
class Categories extends \Backend\Classes\Controller
{
[...]
public function listExtendColumns($list)
{
$list->addColumns([...]);
}
}
The following methods are available on the $list object.
| Method | Description |
|---|---|
| addColumns | adds new columns to the list |
| removeColumn | removes a column from the list |
Each method takes an array of columns similar to the list column configuration.
You can extend the filter scopes of another controller from outside by calling the extendListFilterScopes static method on the controller class. This method can take the argument $filter which will represent the Filter widget object. Take this controller for example:
Categories::extendListFilterScopes(function($filter) {
$filter->addScopes([
'my_scope' => [
'label' => 'My Filter Scope'
]
]);
});
The array of scopes provided is similar to the list filters configuration.
You can also extend the filter scopes internally to the controller class, simply override the listFilterExtendScopes method.
class Categories extends \Backend\Classes\Controller
{
[...]
public function listFilterExtendScopes($filter)
{
$filter->addScopes([...]);
}
}
The following methods are available on the $filter object.
| Method | Description |
|---|---|
| addScopes | adds new scopes to filter widget |
| removeScope | remove scope from filter widget |
The lookup query for the list database model can be extended by overriding the listExtendQuery method inside the controller class. This example will ensure that soft deleted records are included in the list data, by applying the withTrashed scope to the query:
public function listExtendQuery($query)
{
$query->withTrashed();
}
The list filter model query can also be extended by overriding the listFilterExtendQuery method:
public function listFilterExtendQuery($query, $scope)
{
if ($scope->scopeName == 'status') {
$query->where('status', '<>', 'all');
}
}
The collection of records used by the list can be extended by overriding the listExtendRecords method inside the controller class. This example uses the sort method on the record collection to change the sort order of the records.
public function listExtendRecords($records)
{
return $records->sort(function ($a, $b) {
return $a->computedVal() > $b->computedVal();
});
}
Custom list column types can be registered in the back-end with the registerListColumnTypes method of the Plugin registration class. The method should return an array where the key is the type name and the value is a callable function. The callable function receives three arguments, the native $value, the $column definition object and the model $record object.
public function registerListColumnTypes()
{
return [
// A local method, i.e $this->evalUppercaseListColumn()
'uppercase' => [$this, 'evalUppercaseListColumn'],
// Using an inline closure
'loveit' => function($value) { return 'I love '. $value; }
];
}
public function evalUppercaseListColumn($value, $column, $record)
{
return strtoupper($value);
}
Using the custom list column type is as simple as calling it by name using the type option.
# ===================================
# List Column Definitions
# ===================================
columns:
secret_code:
label: Secret code
type: uppercase