Hi people,

I'm having difficulty here with an ambiguous clause. I've searched the archives and forum and come across this problem but I'm none the wiser about what causes this, it's driving me nuts. Does anybody understand what causes this? I've tried a few different syntaxes but got no where with it. Help!

<?php

class FeaturedItemDropDown extends DataObjectDecorator{

	function extraStatics() {
        return array(
            'db' => array(
				'Summary' => 'Varchar(150)'
            ),
            'has_one' => array(
				'FeaturedImage' => 'Image'
            ),
        );
    }

	function updateCMSFields(FieldSet &$fields) {		
		$fields->addFieldToTab('Root.Content.Featured', new TextareaField('Summary', 'Summary (150 characters max)', '', 200));
		$fields->addFieldToTab('Root.Content.Featured', new ImageField('FeaturedImage', 'Upload your image (000 x 000)'));
	}

	public function RandomiseFeaturedItem($num = 1){
		return DataObject::get("sitetree", "`ParentID` = ".$this->owner->ID." AND `Summary` != 'NULL'", "RAND()", "", $num);
	}
}

The problem I have now is that the column 'Summary' in my database is ambiguous

[User Error] Couldn't run query: SELECT "SiteTree_Live"."ClassName", "SiteTree_Live"."Created", "SiteTree_Live"."LastEdited", "SiteTree_Live"."URLSegment", "SiteTree_Live"."Title", "SiteTree_Live"."MenuTitle", "SiteTree_Live"."Content", "SiteTree_Live"."MetaTitle", "SiteTree_Live"."MetaDescription", "SiteTree_Live"."MetaKeywords", "SiteTree_Live"."ExtraMeta", "SiteTree_Live"."ShowInMenus", "SiteTree_Live"."ShowInSearch", "SiteTree_Live"."HomepageForDomain", "SiteTree_Live"."ProvideComments", "SiteTree_Live"."Sort", "SiteTree_Live"."HasBrokenFile", "SiteTree_Live"."HasBrokenLink", "SiteTree_Live"."Status", "SiteTree_Live"."ReportClass", "SiteTree_Live"."CanViewType", "SiteTree_Live"."CanEditType", "SiteTree_Live"."ToDo", "SiteTree_Live"."Version", "SiteTree_Live"."Summary", "SiteTree_Live"."ParentID", "SiteTree_Live"."FeaturedImageID", "SiteTree_Live"."SubsiteID", "SiteTree_Live"."MasterPageID", CASE WHEN "SiteTree_Live"."ClassName" IN ('HomePage') THEN "HomePage_Live"."ExtraDropNavInfo" WHEN "SiteTree_Live"."ClassName" IN ('LibraryHolder') THEN "LibraryHolder_Live"."ExtraDropNavInfo" ELSE NULL END AS "ExtraDropNavInfo", CASE WHEN "SiteTree_Live"."ClassName" IN ('HomePage') THEN "HomePage_Live"."ExtraDropNavInfoClassName" WHEN "SiteTree_Live"."ClassName" IN ('LibraryHolder') THEN "LibraryHolder_Live"."ExtraDropNavInfoClassName" ELSE NULL END AS "ExtraDropNavInfoClassName", "Library_Live"."LibraryHolderID", "BlogEntry_Live"."Date", "BlogEntry_Live"."Author", "BlogEntry_Live"."Tags", "BlogTree_Live"."Name", "BlogTree_Live"."InheritSideBar", "BlogTree_Live"."LandingPageFreshness", "BlogTree_Live"."SideBarID", "Calendar_Live"."DefaultEventDisplay", "Calendar_Live"."DefaultDateHeader", "Calendar_Live"."OtherDatesCount", "CalendarEvent_Live"."Recursion", "CalendarEvent_Live"."CustomRecursionType", "CalendarEvent_Live"."DailyInterval", "CalendarEvent_Live"."WeeklyInterval", "CalendarEvent_Live"."MonthlyInterval", "CalendarEvent_Live"."MonthlyRecursionType1", "CalendarEvent_Live"."MonthlyRecursionType2", "CalendarEvent_Live"."MonthlyIndex", "CalendarEvent_Live"."MonthlyDayOfWeek", "CalendarEvent_Live"."CalendarID", CASE WHEN "SiteTree_Live"."ClassName" IN ('ContactPage') THEN "ContactPage_Live"."Mailto" WHEN "SiteTree_Live"."ClassName" IN ('RegistrationForm') THEN "RegistrationForm_Live"."Mailto" ELSE NULL END AS "Mailto", "ContactPage_Live"."ContactSubmitText", "RegistrationForm_Live"."SubmitText", "GridPage_Live"."Template", "ErrorPage_Live"."ErrorCode", "RedirectorPage_Live"."RedirectionType", "RedirectorPage_Live"."ExternalURL", "RedirectorPage_Live"."LinkToID", "VirtualPage_Live"."VersionID", "VirtualPage_Live"."CopyContentFromID", "BlogHolder_Live"."TrackBacksEnabled", "BlogHolder_Live"."AllowCustomAuthors", "BlogHolder_Live"."OwnerID", "SubsitesVirtualPage_Live"."CustomMetaTitle", "SubsitesVirtualPage_Live"."CustomMetaKeywords", "SubsitesVirtualPage_Live"."CustomMetaDescription", "SubsitesVirtualPage_Live"."CustomExtraMeta", "SiteTree_Live"."ID", CASE WHEN "SiteTree_Live"."ClassName" IS NOT NULL THEN "SiteTree_Live"."ClassName" ELSE 'SiteTree' END AS "RecordClassName" FROM "SiteTree_Live" LEFT JOIN "HomePage_Live" ON "HomePage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "Library_Live" ON "Library_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "LibraryHolder_Live" ON "LibraryHolder_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "BlogEntry_Live" ON "BlogEntry_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "BlogTree_Live" ON "BlogTree_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "Calendar_Live" ON "Calendar_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "CalendarEvent_Live" ON "CalendarEvent_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "ContactPage_Live" ON "ContactPage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "RegistrationForm_Live" ON "RegistrationForm_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "GridPage_Live" ON "GridPage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "ErrorPage_Live" ON "ErrorPage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "RedirectorPage_Live" ON "RedirectorPage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "VirtualPage_Live" ON "VirtualPage_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "BlogHolder_Live" ON "BlogHolder_Live"."ID" = "SiteTree_Live"."ID" LEFT JOIN "SubsitesVirtualPage_Live" ON "SubsitesVirtualPage_Live"."ID" = "SiteTree_Live"."ID" WHERE (`ParentID` = 1 AND `Summary` != 'NULL') AND ("SiteTree_Live"."SubsiteID" IN (0)) ORDER BY RAND() LIMIT 1 Column 'Summary' in where clause is ambiguous

Regards

I think you need to specify the table for the summary filter.
Think the error is because the Summary field also exists in another table that is joined when you do your DO::get call.

You can try to do something like
return DataObject::get("sitetree", "`ParentID` = ".$this->owner->ID." AND `SiteTree_Live`.`Summary` != 'NULL'", "RAND()", "", $num);

or perhaps change the name of the Summary field.

You are free to create new topics for new questions, but in that case please post a link in the original thread instead of duplicating the question. I just wasted time answering the question in http://www.silverstripe.org/general-questions/show/20568 that was already answered here.

Thank you both, a massive help. I can now sleep!

Regards