postgresql - How to save google.maps.Data.MultiPolygon to geometry datatype column in postgres database in rails? -

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i beginner in rails framework, please pardon naive question. have google.maps.data.multipolygon object on frontend want save in database. table searches creates new entry everytime user searches, contains different columns out of have added column datatype :geometry, updated when user draws polygon @ specific search. need update search entry in database, using put call. cannot send whole google.maps.data.multipolygons object on put call, since $.params() unable serialise object (this problem same faced here). 

var polygons = new google.maps.data.multipolygon([polygon]); var search_params = $.param({search: $.extend(this.state.search, {user_id: request.user_id, search_type: search_type})}); request.put('searches/'+this.state.search['id'], search_params, function(){});  uncaught typeerror: cannot read property 'lat' of undefined(…)

so, need send array of location objects. there specific format in array of location object directly converted geometry object on update function? here update function called on search update in ruby:

def update     search = search.find(params[:id])     if search.update_attributes(search_params)       render :json => {:recent => search}, :status => 200     else       render :json => {:error => "could not update search."}, :status => 422     end   end

and search_params is:

def search_params       params.require(:search).permit(         :name,         :user_id,         :q,         :drawn_polygons #this column want updated geometry object       )     end

would :drawn_polygons => rgeo::geos::capimultipolygonimpl work? if does, format of :drawn_polygons object need provide?

or

i need take :drawn_polygons list of coordinates, , change rgeo::geos::capimultipolygonimpl inside update function? if so, how it?

def update     search = search.find(params[:id])     search_parameters = search_params     drawn_polygons = json.parse(uri.decode(search_parameters[:drawn_polygons]))     # code change search_params[:drawn_polygons] geometry object, rgeo::geos::capimultipolygonimpl     search_parameters(:drawn_polygons) = drawn_polygons     if search.update_attributes(search_parameters)       render :json => {:recent => search}, :status => 200     else       render :json => {:error => "could not update search."}, :status => 422     end   end


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