Class: CouchRest::Design

Inherits:
Document show all
Defined in:
lib/couchrest/design.rb

Instance Attribute Summary

Attributes inherited from Document

#database

Attributes inherited from Response

#headers, #raw

Instance Method Summary collapse

Methods inherited from Document

#copy, #destroy, #id, #id=, #new?, #rev, #uri, use_database

Methods included from InheritableAttributes

#couchrest_inheritable_accessor, #couchrest_inheritable_reader, #couchrest_inheritable_writer

Methods included from Attachments

#delete_attachment, #fetch_attachment, #put_attachment

Methods inherited from Response

#[], #[]=, #delete, #initialize

Constructor Details

This class inherits a constructor from CouchRest::Response

Instance Method Details

#name ⇒ Object 



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# File 'lib/couchrest/design.rb', line 52

def name
  id.sub('_design/','') if id
end

#name=(newname) ⇒ Object 



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# File 'lib/couchrest/design.rb', line 56

def name= newname
  self['_id'] = "_design/#{newname}"
end

#save ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/couchrest/design.rb', line 60

def save
  raise ArgumentError, "_design docs require a name" unless name && name.length > 0
  super
end

#view(view_name, query = {}, &block) ⇒ Object

Dispatches to any named view. (using the database where this design doc was saved)



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# File 'lib/couchrest/design.rb', line 40

def view view_name, query={}, &block
  view_on database, view_name, query, &block
end

#view_by(*keys) ⇒ Object 



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# File 'lib/couchrest/design.rb', line 4

def view_by *keys
  opts = keys.pop if keys.last.is_a?(Hash)
  opts ||= {}
  self['views'] ||= {}
  method_name = "by_#{keys.join('_and_')}"

  if opts[:map]
    view = {}
    view['map'] = opts.delete(:map)
    if opts[:reduce]
      view['reduce'] = opts.delete(:reduce)
      opts[:reduce] = false
    end
    self['views'][method_name] = view
  else
    doc_keys = keys.collect{|k|"doc['#{k}']"} # this is where :require => 'doc.x == true' would show up
    key_emit = doc_keys.length == 1 ? "#{doc_keys.first}" : "[#{doc_keys.join(', ')}]"
    guards = opts.delete(:guards) || []
    guards += doc_keys.map{|k| "(#{k} != null)"}
    map_function = <<-JAVASCRIPT
function(doc) {
  if (#{guards.join(' && ')}) {
emit(#{key_emit}, null);
  }
}
JAVASCRIPT
    self['views'][method_name] = {
      'map' => map_function
    }
  end
  self['views'][method_name]['couchrest-defaults'] = opts unless opts.empty?
  method_name
end

#view_on(db, view_name, query = {}, &block) ⇒ Object

Dispatches to any named view in a specific database



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# File 'lib/couchrest/design.rb', line 45

def view_on db, view_name, query={}, &block
  view_name = view_name.to_s
  view_slug = "#{name}/#{view_name}"
  defaults = (self['views'][view_name] && self['views'][view_name]["couchrest-defaults"]) || {}
  db.view(view_slug, defaults.merge(query), &block)
end