Arguments

layerId  (integer)  'handle' identifier of the 'GIS Layer' to be examined for a contained Feature attribute
name  (string)  the name of the Feature attribute to be verified

Return

T or NIL

Example

(vl-load-gis)  T
(setq layers (gis:get-layers))  ("shp_3857_point_2d_utf8")
(setq layerId (gis:get-layer (car layers)))  1736904439915
(setq attributes (gis:layer-get-attributes layerId))  ("id" "name" "int_number" "dec_number" "date")
(gis:layer-has-attribute layerId "id")  T
(gis:layer-has-attribute layerId "NewId")  NIL

Remarks

a 'GIS Feature Attribute' represents a "Column" in the GIS Database table; each 'GIS Feature' (built-up from dwg entities) is a row in such table;
the 'GIS Feature Attribute' name string is always handled as case-insensitive !