As of UE 5.5, there is GetAssetFilter, this is great to enforce custom filtering of assets you can’t really do via the UPROPERTY line.
One use case i saw recently is for a DataTable filters to allow child row types, which is not possible with the default meta.<\/p>\n\n\n
\n UPROPERTY(EditAnywhere, Category="Data", meta=(GetAssetFilter="MyTableRowsFilter"))\n TObjectPtr<UDataTable> MyDataTable;\n\n UFUNCTION()\n bool MyTableRowsFilter(const FAssetData& AssetData);\n<\/pre><\/div>\n\n\nThe GetAssetFilter will go through all UObjects towards the outer object to find the matching function for example MyTableRowsFilters. Once found it will call this for filtering.
Heres an example filter i made
<\/p>\n\n\n
\nbool UMyObject::MyTableRowsFilter(const FAssetData& AssetData)\n{\n FString Parent = FParentDataTableRow::StaticStruct()->GetPathName();\n static const FName RowStructureTagName("RowStructure");\n FString RowStructure;\n if (AssetData.GetTagValue<FString>(RowStructureTagName, RowStructure))\n {\n if (RowStructure == Parent)\n {\n return false;\n }\n\n \/\/ This is slow, but at the moment we don't have an alternative to the short struct name search\n UScriptStruct* RowStruct = UClass::TryFindTypeSlow<UScriptStruct>(RowStructure);\n if (RowStruct && RowStruct->IsChildOf(FParentDataTableRow::StaticStruct()))\n {\n return false;\n }\n }\n return true;\n}\n<\/pre><\/div>\n\n\nThis allows the picking of DataTables that are or inherits from FParentDataTableRow. Struct example below
<\/p>\n\n\n
\nUSTRUCT(BlueprintType)\nstruct FParentDataTableRow : public FTableRowBase\n{\n GENERATED_BODY();\n\n \n};\nUSTRUCT(BlueprintType)\nstruct FChildParentRow : public FParentDataTableRow\n{\n GENERATED_BODY();\n\n};\n<\/pre><\/div>\n\n\nThis is not possible any other way than this. But this is not required for FDataTableRowHandle as it does handle child structs!!!!<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
As of UE 5.5, there is GetAssetFilter, this is great to enforce custom filtering of assets you can’t really do via the UPROPERTY line. One use case i saw recently is for a DataTable filters to allow child row types, which is not possible with the default meta. The GetAssetFilter will go through all UObjects … Custom Asset Filtering (GetAssetFilter)<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-290","post","type-post","status-publish","format-standard","hentry","category-random-bits"],"rise-blocks_total_comments":0,"rise-blocks_categories":[{"term_id":20,"name":"Random Bits","slug":"random-bits","term_group":0,"term_taxonomy_id":20,"taxonomy":"category","description":"Random bits of useful stuff.","parent":0,"count":2,"filter":"raw","cat_ID":20,"category_count":2,"category_description":"Random bits of useful stuff.","cat_name":"Random Bits","category_nicename":"random-bits","category_parent":0}],"rise-blocks_excerpt":"As of UE 5.5, there is GetAssetFilter, this is great to enforce custom filtering of assets you can’t really do via the UPROPERTY line. One use case i saw recently is for a DataTable filters to allow child row types, which is not possible with the default meta. The GetAssetFilter will go through all UObjects towards the outer object to..","_links":{"self":[{"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/posts\/290","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=290"}],"version-history":[{"count":1,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/posts\/290\/revisions"}],"predecessor-version":[{"id":291,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=\/wp\/v2\/posts\/290\/revisions\/291"}],"wp:attachment":[{"href":"https:\/\/www.thegames.dev\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=290"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=290"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thegames.dev\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=290"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}