Collection and input editing

For a single nested field in a struct array, asset(set_property) already accepts a key selector:

{"action":"set_property","assetPath":"/Game/Data/DA_Weapons","propertyName":"WeaponProfiles[WeaponId=Rifle].DisplayName","value":"Service rifle","save":false}

The selector must match exactly one element. asset(read_properties) accepts the same path. Use asset(bulk_set_properties) for several keyed field writes with preflight and read-back.

Update or clone a collection entry

asset(edit_collection_entry) selects an existing struct with entryKey. For a struct array, also supply keyField. For a map, the key is converted using the map's reflected key type. Omit newKey to update the selected entry; supply an unused newKey to clone it. Existing destinations and ambiguous array keys are refused.

{"action":"edit_collection_entry","assetPath":"/Game/Data/DA_Weapons","propertyName":"WeaponProfiles","keyField":"WeaponId","entryKey":"Rifle","newKey":"Carbine","overrides":{"DisplayName":"Carbine","Ammo.MagazineCapacity":5},"dryRun":true}

{"action":"edit_collection_entry","assetPath":"/Game/Data/DA_Poses","propertyName":"Profiles","entryKey":"Weapon_Rifle","newKey":"Weapon_Carbine","overrides":{"Muzzle.Translation":{"X":0,"Y":82.5,"Z":-3.8}},"save":false}

Overrides accept nested objects and dotted paths through structs. Omitted fields retain their values; arrays supplied as overrides replace that field. Object references remain references. Cloning structs containing instanced subobjects is refused. The collection path must stay within the data asset or its owned subobjects; use the existing property actions for Blueprint defaults.

The whole edit is validated before mutation. dryRun=true returns proposedValue without changing or saving the asset. A write returns value read from the asset, its entry count, and persistence fields. save defaults to true. Its rollback restores the previous whole collection using the same save policy, so replay it before subsequent collection edits.

Clone DataTable rows

Use asset(read_datatable) with rowFilter and columns, or asset(get_datatable_row) for a named row. asset(clone_datatable_rows) copies existing rows directly and applies field overrides without exporting the table:

{"action":"clone_datatable_rows","assetPath":"/Game/Data/DT_Recipes","clones":[{"sourceRow":"Recipe_Rifle","rowName":"Recipe_Carbine","overrides":{"DisplayName":"Carbine","Count":5}},{"sourceRow":"Recycle_Rifle","rowName":"Recycle_Carbine"}],"save":false}

Every source must exist before the call; a later clone cannot use a destination created by the same batch. Every destination must be unused, including case-insensitive row-name collisions. Rows containing instanced subobjects are refused. The complete batch is preflighted before mutation. dryRun=true returns proposedRows; a write returns rows with actual fields, clonedCount, rowCount, and persistence fields. save defaults to true. Editor undo covers the transaction. Rollback calls remove_datatable_row with the cloned rowNames and the same save policy. It is marked lossy because row change hook side effects are not reversed. Replay it before further edits to the cloned rows. The removal action accepts either one rowName or an array of rowNames; batch or unsaved removals use editor undo to restore deleted values.

Per-mapping input settings

gameplay(read_imc) reports each row's mappingIndex, settingBehavior, local playerMappableKeySettings and effectivePlayerMappableKeySettings. The local value is null when no override subobject exists. Effective settings follow InheritSettingsFromAction, OverrideSettings, or IgnoreSettings.

{"action":"set_player_mappable_settings","imcPath":"/Game/Input/IMC_Vehicle","mappingIndex":0,"settingBehavior":"OverrideSettings","playerMappableKeySettings":{"Name":"ControllerSteering","DisplayName":"Controller steering","DisplayCategory":"Vehicle"},"save":false}

Supply reflected settings fields in playerMappableKeySettings, or use the existing mappingName, displayName and displayCategory parameters. Omitted fields retain their values. A new settings object needs a non-empty Name or mappingName. Set playerMappableKeySettings to null to clear the local object. Setting only the behavior preserves the local object. dryRun validates without writing; save defaults to true. Rollback addresses the same mapping index, so replay it before reordering mappings. Clearing an override may recreate its object on rollback; clearing a custom settings subclass requires editor undo.

InputAction settings still use inputActionPath and mappingName. To duplicate an InputAction together with its triggers, modifiers and settings, use asset(duplicate) with sourcePath, destinationPath and onConflict="error", then inspect it with gameplay(read_input_action).

Static editor functions

reflection(reflect_class) describes a project's reflected functions. Call a static BlueprintCallable function with editor(invoke_static_function) using className, functionName and an args object keyed by reflected parameter names. The class can be a component or another reflected class, as well as a function library. Use the reflected C++ function spelling. Return and output parameters appear under returnValues. These calls can have arbitrary side effects; persistence and undo depend on the called function.