Class: ODataController

Inherits:

ApplicationController

• Object
• ApplicationController
• ODataController

Defined in:

app/controllers/o_data_controller.rb

Constant Summary

@@path_param =

:__path__.freeze

@@schema =

OData::ActiveRecordSchema::Base.new.freeze

@@parser =

OData::AbstractQuery::Parser.new(@@schema).freeze

Instance Method Summary

• #metadata ⇒ Object
• #resource ⇒ Object
• #service ⇒ Object

Instance Method Details

#metadata ⇒ Object

# File 'app/controllers/o_data_controller.rb', line 32

def metadata
  respond_to do |format|
    format.xml  # metadata.xml.builder
  end
end

#resource ⇒ Object

# File 'app/controllers/o_data_controller.rb', line 38

def resource
  @last_segment = @query.segments.last
  
  @results = @query.execute!
  
  case @last_segment.class.segment_name
  when OData::AbstractQuery::Segments::CountSegment.segment_name
    render :text => @results.to_i
  when OData::AbstractQuery::Segments::LinksSegment.segment_name
    request.format = :xml unless request.format == :json
    
    respond_to do |format|
      format.xml  { render :inline => "xml.instruct!; @results.empty? ? xml.links('xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') : xml.links('xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') { @results.each { |r| xml.uri(o_data_resource_url(r[1])) } }", :type => :builder }
      format.json { render :json => { "links" => @results.collect { |r| { "uri" => r } } }.to_json }
    end
  when OData::AbstractQuery::Segments::ValueSegment.segment_name
    render :text => @results.to_s
  when OData::AbstractQuery::Segments::PropertySegment.segment_name
    request.format = :xml unless request.format == :json
    
    respond_to do |format|
      format.xml  { render :inline => "xml.instruct!; value.blank? ? xml.tag!(key.to_sym, 'm:null' => true, 'xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices', 'xmlns:m' => 'http://schemas.microsoft.com/ado/2007/08/dataservices') : xml.tag!(key.to_sym, value, 'edm:Type' => type, 'xmlns' => 'http://schemas.microsoft.com/ado/2007/08/dataservices', 'xmlns:edm' => 'http://schemas.microsoft.com/ado/2007/05/edm')", :locals => { :key => @results.keys.first.name, :type => @results.keys.first.return_type, :value => @results.values.first }, :type => :builder }
      format.json { render :json => { @results.keys.first.name => @results.values.first }.to_json }
    end
  when OData::AbstractQuery::Segments::NavigationPropertySegment.segment_name
    @countable = @last_segment.countable?
    
    @navigation_property = @last_segment.navigation_property
    @polymorphic = @navigation_property.to_end.polymorphic?
    
    if @polymorphic
      @entity_type = nil
      @entity_type_name = @navigation_property.to_end.name.singularize
    else
      @entity_type = @navigation_property.to_end.entity_type
      @entity_type_name = @entity_type.name
    end
    
    @collection_name = @entity_type_name.pluralize
    
    @expand_navigation_property_paths = {}
    if expand_option = @query.options.find { |o| o.option_name == OData::AbstractQuery::Options::ExpandOption.option_name }
      @expand_navigation_property_paths = expand_option.navigation_property_paths
    end
    
    respond_to do |format|
      format.atom # resource.atom.builder
      format.json # resource.json.erb
    end
  when OData::AbstractQuery::Segments::CollectionSegment.segment_name
    @countable = @last_segment.countable?
    
    @navigation_property = nil
    @polymorphic = true
    
    @entity_type = @last_segment.entity_type
    
    @expand_navigation_property_paths = {}
    if expand_option = @query.options.find { |o| o.option_name == OData::AbstractQuery::Options::ExpandOption.option_name }
      @expand_navigation_property_paths = expand_option.navigation_property_paths
    end
    
    respond_to do |format|
      format.atom # resource.atom.builder
      format.json # resource.json.erb
    end
  else
    # in theory, this branch is unreachable because the <tt>parse_resource_path_and_query_string!</tt>
    # method will throw an exception if the <tt>OData::AbstractQuery::Parser</tt> fails to match any
    # segment of the resource path.
    raise OData::AbstractQuery::Errors::AbstractQueryException.new(@query)
  end
end

#service ⇒ Object

# File 'app/controllers/o_data_controller.rb', line 25

def service
  respond_to do |format|
    format.xml  # service.xml.builder
    format.json { render :json => @@schema.to_json }
  end
end