Question

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NoMethodError (undefined method `[]' for nil:NilClass)

I am new to rails 3, and I am trying to render something to an HTML form:

<td class="kanban-task-handler">by: <%=h (!@tasks[activity['taskid']]['assignee'].nil? ? @tasks[activity['taskid']]['assignee'] : '') %></td>

but I’m getting this error:

undefined method `[]' for nil:NilClass):

but I’m checking this variable and stating if it’s nil–> then print out nothing…
so why isn’t this working?

Answer 1

I’m not sure what you’re trying to do here, but it seems like @tasks is nil here. You could just check it with @tasks.nil?

But remember, if the @tasks is an array it will not give you nil? -> true instead you need to use <Array>.empty?

A safer way of checking this is:

@task.try(:attribute).try(:attribute2) etc