ruby on rails - Trying to display fields from hash but getting undefined method `[]' for nil:NilClass -
i receiving error "undefined method `[]' nil:nilclass" when trying display field json parsed hash. how coll_title data display?
the data alinks:
[{ "role"=>"source", "relator"=>"dnr", "terms"=>[], "_resolved"=>{ "lock_version"=>0, "publish"=>true, "display_name"=>{ "coll_num"=>"024", "coll_title"=>"collection title" } } }] the code:
def display_agents(hash, opts = {}) html = "<div><small>" html << "<ul style='list-style-type:none'>" alinks = json.parse( hash["json"] )["linked_agents"] alinks.each |_resolved| html << "<li>#{_resolved["display_name"]["coll_title"]}</li>" end html << "</ul>" html << "</small></div><div class='clearfix'></div>" html.html_safe end the call:
<td> <% if result['primary_type'] === "resource" or result['primary_type'] === "digital_object" or result['primary_type'] === "accession" %> <%= display_agents(result) %> <% end %> </td> the error:
undefined method `[]' nil:nilclass extracted source (around line #85): 82: <% end %> 83: <td> 84: <% if result['primary_type'] === "resource" or result['primary_type'] === "digital_object" or result['primary_type'] === "accession" %> 85: <%= display_agents(result) %> 86: <% end %> 87: </td> 88: <%#<td>%> edit: added method call , error display.
assuming data alinks show linked_agents array (it's not 100% clear question) - need
alinks.each |agent_link| html << "<li>#{agent_link["_resolved"]["display_name"]["coll_title"]}</li>" end 
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