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https://github.com/silverstripe/silverstripe-framework
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27113f82c3
In 3.0 there was some confusion about whether DataLists and ArrayLists were mutable or not. If DataLists were immutable, they'd return the result, and your code would look like $list = $list->filter(....); If DataLists were mutable, they'd operate on themselves, returning nothing, and your code would look like $list->filter(....); This makes all DataLists and ArrayList immutable for all _searching_ operations. Operations on DataList that modify the underlying SQL data store remain mutating. - These functions no longer mutate the existing object, and if you do not capture the value returned by them will have no effect: ArrayList#reverse ArrayList#sort ArrayList#filter ArrayList#exclude DataList#dataQuery (use DataList#alterDataQuery to modify dataQuery in a safe manner) DataList#where DataList#limit DataList#sort DataList#addFilter DataList#applyFilterContext DataList#innerJoin DataList#leftJoin DataList#find DataList#byIDs DataList#reverse - DataList#setDataQueryParam has been added as syntactic sugar around the most common cause of accessing the dataQuery directly - setting query parameters - RelationList#setForeignID has been removed. Always use RelationList#forForeignID when querying, and overload RelationList#foreignIDList when subclassing. - Relatedly,the protected variable RelationList->foreignID has been removed, as the ID is now stored on a query parameter. Use RelationList#getForeignID to read it.
23 lines
688 B
PHP
23 lines
688 B
PHP
<?php
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/**
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* Additional interface for {@link SS_List} classes that are limitable - able to have a subset of the list extracted.
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*
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* All methods in this interface are immutable - they should return new instances with the limit
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* applied, rather than applying the limit in place
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*
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* @see SS_List, SS_Sortable, SS_Filterable
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*/
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interface SS_Limitable {
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/**
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* Returns a new instance of this list where no more than $limit records are included.
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* If $offset is specified, then that many records at the beginning of the list will be skipped.
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* This matches the behaviour of the SQL LIMIT clause.
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*
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* @return SS_Limitable
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*/
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public function limit($limit, $offset = 0);
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}
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