SearchContext
SearchContext manages searching of properties on one or more DataObject types, based on a given set of input parameters. SearchContext is intentionally decoupled from any controller-logic, it just receives a set of search parameters and an object class it acts on.
The default output of a SearchContext is either a SQLQuery object for further refinement, or a DataObject instance.
[notice] SearchContext is mainly used by ModelAdmin. [/notice]
Usage
Defining search-able fields on your DataObject.
<?php
class MyDataObject extends DataObject {
private static $searchable_fields = array(
'Name',
'ProductCode'
);
}In this example we're defining three attributes on our MyDataObject subclass: PublicProperty, HiddenProperty
and MyDate. The attribute HiddenProperty should not be searchable, and MyDate should only search for dates
after the search entry (with a GreaterThanFilter).
<?php
class MyDataObject extends DataObject {
private static $db = array(
'PublicProperty' => 'Text'
'HiddenProperty' => 'Text',
'MyDate' => 'Date'
);
public function getDefaultSearchContext() {
$fields = $this->scaffoldSearchFields(array(
'restrictFields' => array('PublicProperty','MyDate')
));
$filters = array(
'PublicProperty' => new PartialMatchFilter('PublicProperty'),
'MyDate' => new GreaterThanFilter('MyDate')
);
return new SearchContext(
$this->class,
$fields,
$filters
);
}
}See the SearchFilter documentation for more information about filters to use such as the
GreaterThanFilter.
[/notice]
[notice]
In case you need multiple contexts, consider name-spacing your request parameters by using FieldList->namespace() on
the $fields constructor parameter.
[/notice]
Generating a search form from the context
<?php
..
class Page_Controller extends ContentController {
public function SearchForm() {
$context = singleton('MyDataObject')->getCustomSearchContext();
$fields = $context->getSearchFields();
$form = new Form($this, "SearchForm",
$fields,
new FieldList(
new FormAction('doSearch')
)
);
return $form;
}
public function doSearch($data, $form) {
$context = singleton('MyDataObject')->getCustomSearchContext();
$results = $context->getResults($data);
return $this->customise(array(
'Results' => $results
))->renderWith('Page_results');
}
}For pagination records on multiple pages, you need to wrap the results in a
PaginatedList object. This object is also passed the generated SQLQuery
in order to read page limit information. It is also passed the current
SS_HTTPRequest object so it can read the current page from a GET var.
public function getResults($searchCriteria = array()) {
$start = ($this->getRequest()->getVar('start')) ? (int)$this->getRequest()->getVar('start') : 0;
$limit = 10;
$context = singleton('MyDataObject')->getCustomSearchContext();
$query = $context->getQuery($searchCriteria, null, array('start'=>$start,'limit'=>$limit));
$records = $context->getResults($searchCriteria, null, array('start'=>$start,'limit'=>$limit));
if($records) {
$records = new PaginatedList($records, $this->getRequest());
$records->setPageStart($start);
$records->setPageLength($limit);
$records->setTotalItems($query->unlimitedRowCount());
}
return $records;
}notice that if you want to use this getResults function, you need to change the function doSearch for this one:
public function doSearch($data, $form) {
$context = singleton('MyDataObject')->getCustomSearchContext();
$results = $this->getResults($data);
return $this->customise(array(
'Results' => $results
))->renderWith(array('Catalogo_results', 'Page'));
}The change is in $results = $this->getResults($data);, because you are using a custom getResults function.
Another thing you cant forget is to check the name of the singleton you are using in your project. the example uses MyDataObject, you need to change it for the one you are using
For more information on how to paginate your results within the template, see Tutorial: Site Search.
The Pagination Template
to show the results of your custom search you need at least this content in your template, notice that Results.PaginationSummary(4) defines how many pages the search will show in the search results. something like:
Next 1 2 3 4 5 … 558
<% if $Results %>
<ul>
<% loop $Results %>
<li>$Title, $Autor</li>
<% end_loop %>
</ul>
<% else %>
<p>Sorry, your search query did not return any results.</p>
<% end_if %>
<% if $Results.MoreThanOnePage %>
<div id="PageNumbers">
<p>
<% if $Results.NotFirstPage %>
<a class="prev" href="$Results.PrevLink" title="View the previous page">Prev</a>
<% end_if %>
<span>
<% loop $Results.PaginationSummary(4) %>
<% if $CurrentBool %>
$PageNum
<% else %>
<% if $Link %>
<a href="$Link" title="View page number $PageNum">$PageNum</a>
<% else %>
…
<% end_if %>
<% end_if %>
<% end_loop %>
</span>
<% if $Results.NotLastPage %>
<a class="next" href="$Results.NextLink" title="View the next page">Next</a>
<% end_if %>
</p>
</div>
<% end_if %>Available SearchFilters
See SearchFilter API Documentation