If more than two $from were added through SQLQuery->addFrom(),
the getOrderedJoins() comparison kicks in. It assumes all $from
parts are in array notation, which isn't always the case.
For legacy reasons, and because we don't have full API support,
you can still add literal joins through addFrom('INNER JOIN ...').
On PHP 5.3, the ordering comparison still works because it
allows array access in strings, with string rather than numeric indexes.
Thankfully that's no longer supported in PHP 5.4.
DataQuery::initialiseQuery() will add a default sort to a query,
and when calling up an aggregate it will make a query like this
which doesn't make sense:
SELECT MAX("LastEdited") FROM "Member" ORDER BY "ID"
In this case there is no need to add the ORDER BY, and it will
break databases like MSSQL in cases such as
GenericTemplateGlobalProvider
which provides a default List() function for adding aggregates
into SSViewer template cacheblocks.
If we add a limit, however, then it does make sense:
SELECT MAX("LastEdited") FROM "Member" ORDER BY "ID" LIMIT 10
This fixes SQLQuery::aggregate() to NOT add an ORDER BY to an
aggregate call if there is no limit.
If multiple image manipulations are performend the resulting cached image is stored in assets/_resampled because the cached version of the image has no ParentID, which cacheFilename needs to set the correct path.
Allow DataList::limit() to take a null value to remove the limit.
Added tests for limit(). Note the one failure, currently the ORM doesn't support unlimited values with an offset.
The function "first" on ArrayList uses the PHP function "reset", which
returns false if there aren't any elements in the array. Two functions
inside ArrayList use this function, "canFilterBy" and "byID". I've
changed these functions to catch the possibility of a false return from
first().
Commit 964b3f2 fixed an issue where dbObject was returning casting helpers for
fields that were not actually DB objects, but had something in $casting config.
However, because dbObject was no longer calling DataObject->castingHelper, this
exposed a bug that the underlying function db($fieldName) was not returning
field specs for the base fields that are created by SS automatically on all
DataObjects (i.e. Created, LastEdited, etc).
This commit fixes the underlying issue that DataObject->db($fieldName) should
return the field specs for *all* DB fields like its documentation says it will,
including those base fields that are automatically created and do not appear in
$db.
SQLQuery->setLimit(0, 99) should result in "SELECT ... LIMIT 0 OFFSET 1".
In fact it does "SELECT ..." without a LIMIT clause at all,
which is unexpected. This is regardless of the $offset value.
This caused problems when duplicate() was used in the CMS UI
to duplicate a SiteTree object. Since every object of this type
has a ParentID relation, it copied this empty relation into
new "ghost page".
See https://github.com/silverstripe/silverstripe-cms/issues/689
