Class: Erd::ErdController

Inherits:
ApplicationController show all
Defined in:
app/controllers/erd/erd_controller.rb

Instance Method Summary collapse

Instance Method Details

#index ⇒ Object 



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# File 'app/controllers/erd/erd_controller.rb', line 7

def index
  Rails.application.eager_load!
  RailsERD.options[:filename], RailsERD.options[:filetype] = Rails.root.join('tmp/erd'), 'plain'
  RailsERD::Diagram::Graphviz.create
  plain = Rails.root.join('tmp/erd.plain').read
  positions = if (json = Rails.root.join('tmp/erd_positions.json')).exist?
    ActiveSupport::JSON.decode json.read
  else
    {}
  end
  @erd = render_plain plain, positions

  @migrations = Erd::Migrator.status
end

#migrate ⇒ Object 



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# File 'app/controllers/erd/erd_controller.rb', line 74

def migrate
  Erd::Migrator.run_migrations :up => params[:up], :down => params[:down]
  redirect_to erd.root_path, :flash => {:executed_migrations => params.slice(:up, :down)}
end

#update ⇒ Object 



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# File 'app/controllers/erd/erd_controller.rb', line 22

def update
  changes = ActiveSupport::JSON.decode(params[:changes])
  executed_migrations, failed_migrations = [], []
  changes.each do |row|
    begin
      action, model, column, from, to = row['action'], row['model'], row['column'], row['from'], row['to']
      if action == 'move'
        model = model.tableize
        json_file = Rails.root.join('tmp', 'erd_positions.json')
        positions = json_file.exist? ? ActiveSupport::JSON.decode(json_file.read) : {}
        positions[model] = to
        json_file.open('w') {|f| f.write positions.to_json}
      else
        case action
        when 'create_model'
          columns = column.split(' ').compact
          generated_migration_file = Erd::GenaratorRunner.execute_generate_model model, columns
        when 'remove_model'
          model = model.tableize
          generated_migration_file = Erd::GenaratorRunner.execute_generate_migration "drop_#{model}"
          gsub_file generated_migration_file, /def (up|change).*  end/m, "def change\n    drop_table :#{model}\n  end"
        when 'rename_model'
          model, from, to = from.tableize, to.tableize, model.tableize
          generated_migration_file = Erd::GenaratorRunner.execute_generate_migration "rename_#{from}_to_#{to}"
          gsub_file generated_migration_file, /def (up|change).*  end/m, "def change\n    rename_table :#{from}, :#{to}\n  end"
        when 'add_column'
          model = model.tableize
          name_and_type = column.scan(/(.*)\((.*?)\)/).first
          name, type = name_and_type[0], name_and_type[1]
          generated_migration_file = Erd::GenaratorRunner.execute_generate_migration "add_#{name}_to_#{model}", ["#{name}:#{type}"]
        when 'rename_column'
          model = model.tableize
          generated_migration_file = Erd::GenaratorRunner.execute_generate_migration "rename_#{model}_#{from}_to_#{to}"
          gsub_file generated_migration_file, /def (up|change).*  end/m, "def change\n    rename_column :#{model}, :#{from}, :#{to}\n  end"
        when 'alter_column'
          model = model.tableize
          generated_migration_file = Erd::GenaratorRunner.execute_generate_migration "change_#{model}_#{column}_type_to_#{to}"
          gsub_file generated_migration_file, /def (up|change).*  end/m, "def change\n    change_column :#{model}, :#{column}, :#{to}\n  end"
        else
          raise "unexpected action: #{action}"
        end
        Erd::Migrator.run_migrations :up => generated_migration_file
        executed_migrations << generated_migration_file
      end
    rescue ::Erd::MigrationError => e
      failed_migrations << e.message
    end
  end

  redirect_to erd.root_path, :flash => {:executed_migrations => {:up => executed_migrations}, :failed_migrations => failed_migrations}
end