Don't know how to build task 'erd'

[sps196]

Hi,

rake doesn't seem to know about the erd task:

$ rake erd
rake/rdoctask is deprecated. Use rdoc/task instead (in RDoc 2.4.2+)
rake aborted!
Don't know how to build task 'erd'

(See full trace by running task with --trace)

I've also tried this with rake 0.8.7, and aside from the deprecation warning disappearing nothing changed.

This is my Gemfile:

$ cat Gemfile

source :rubygems

group :development do
gem "rails-erd"
end

And bundle claims it's all installed correctly:

$ bundle install
Using activesupport (3.0.9)
Using builder (2.1.2)
Using i18n (0.5.0)
Using activemodel (3.0.9)
Using arel (2.0.10)
Using tzinfo (0.3.29)
Using activerecord (3.0.9)
Using ruby-graphviz (0.9.21)
Using rails-erd (0.4.5)
Using bundler (1.0.15)
Your bundle is complete! Use bundle show [gemname] to see where a bundled gem is installed.

$ bundle show rails-erd
/usr/lib/ruby/gems/1.8/gems/rails-erd-0.4.5

I'm pretty stumped. Here's a full rake trace:

$ rake erd --trace
rake/rdoctask is deprecated. Use rdoc/task instead (in RDoc 2.4.2+)
rake aborted!
Don't know how to build task 'erd'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/task_manager.rb:49:in []' /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:111:ininvoke_task'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:90:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:90:ineach'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:90:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:129:instandard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:84:in top_level' /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:62:inrun'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:129:in standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.9.2/lib/rake/application.rb:59:inrun'
/usr/lib/ruby/gems/1.8/gems/rake-0.9.2/bin/rake:32
/usr/bin/rake:19:in `load'
/usr/bin/rake:19

Sam

[kaleemullah]

same issue

[dwwoelfel]

I solved this by adding the following line to my Rakefile:

require '/usr/lib/ruby/gems/1.8/gems/rails-erd-0.4.5/lib/rails_erd/tasks.rake'

I'm sure there's a better way, but this works.

[nicolasgarnil]

I'm having the same problem.

[rolftimmermans]

The rake task is automatically registered in Rails projects. If you don't use Rails directly, you can use Rails ERD by calling the API. Here's an example:

require "rails_erd/diagram/graphviz"
# Load your models here.
RailsERD::Diagram::Graphviz.create

A future version may supply an executable file so you no longer need Rake and/or Rails.

[Adithya-copart]

For others who encounter the NoMethodError: undefined method `application' for Rails:Module,
I was able to monkey-patch the name method in domain class to return nil and got around this.

Used outside Rails with ActiveRecord 5.1.1

 RailsERD::Diagram::Graphviz.create
NoMethodError: undefined method `application' for Rails:Module
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/domain.rb:52:in `name'
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/diagram/graphviz.rb:179:in `block in <class:Graphviz>'
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/diagram.rb:126:in `instance_eval'
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/diagram.rb:126:in `generate'
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/diagram.rb:119:in `create'
	from /Users/adpentela/.rvm/gems/ruby-2.4.0/gems/rails-erd-1.5.2/lib/rails_erd/diagram.rb:74:in `create'
	from (irb):11
	from /Users/adpentela/.rvm/rubies/ruby-2.4.0/bin/irb:11:in `<main>'

[ADTC]

Try bundle exec erd as this will directly execute it instead of running it as a Rails Task.