ruby on rails - Bizarre Rails4 error when using link_to -

this line of code:

<%=link_to('click video.', image_path("create_institution.gif"), :target => "_blank")%> 

is throwing error:

couldn't find image 'id'=create_institution  request parameters   {"action"=>"show", "controller"=>"images", "id"=>"create_institution", "format"=>"gif"} 

is problem routes or else? "create_institution.gif" in /assets/images have model "images" have not had problem using images elsewhere.

pastebin of my routes.rb

in application, have image resource , why image_path resolves images#show

from documentation of image_path,

if have images application resources method may conflict named routes. alias path_to_image provided avoid that. rails uses alias internally, , plugin authors encouraged so.

so, can use path_to_image resolve this.

<%=link_to('click video.', path_to_image("create_institution.gif"), :target => "_blank")%> 

hope helps!