Class: Toast::Association

Inherits:
Resource show all
Defined in:
lib/toast/association.rb

Instance Attribute Summary collapse

Attributes inherited from Resource

#base_uri, #payload_content_type, #prefered_media_type

Instance Method Summary collapse

Methods inherited from Resource

#apply, build, get_class_by_resource_name

Constructor Details

#initialize(model, id, subresource_name, params, format, config, assoc_model, assoc_config_in, assoc_config_out) ⇒ Association

Returns a new instance of Association.



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 
# File 'lib/toast/association.rb', line 6

def initialize model, id, subresource_name, params, format, config, assoc_model, assoc_config_in, assoc_config_out

  unless config.exposed_associations.include? subresource_name
    raise ResourceNotFound
  end

  @model = model
  @record = model.find(id) rescue raise(ResourceNotFound)
  @assoc = subresource_name
  @format = format
  @is_collection = [:has_many, :has_and_belongs_to_many].include? @model.reflect_on_association(@assoc.to_sym).macro
  @config = config
  @associate_model = assoc_model
  @associate_config_in = assoc_config_in
  @associate_config_out = assoc_config_out
  @params = params
end

Instance Attribute Details

#model ⇒ Object (readonly)

Returns the value of attribute model.



4
5
6
 
# File 'lib/toast/association.rb', line 4

def model
  @model
end

Instance Method Details

#delete ⇒ Object

Raises:



143
144
145
 
# File 'lib/toast/association.rb', line 143

def delete
  raise MethodNotAllowed
end

#get ⇒ Object 



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/toast/association.rb', line 24

def get

  unless @record.class.reflect_on_all_associations.detect{|a| a.name.to_s == @assoc}
    raise "Toast Error: Association '#{@assoc}' not found in model '#{@record.class}'"
  end

  reflection = @model.reflect_on_association(@assoc.to_sym)

  if reflection.collection?


    if(@config.pass_params_to.include?(@assoc) and
       reflection.options[:extend] and
       reflection.options[:extend].detect{|e| e.method_defined? :find_by_params} )

      result, pagination_info = paginate_query( @config, @assoc,
                                                @record.send(@assoc).find_by_params(@params), @params)
    else

      result, pagination_info = paginate_query( @config, @assoc,
                                                @record.send(@assoc), @params)

    end

    raise ResourceNotFound if result.nil?

    {
      :json => result.map{|r|
        r.represent( @associate_config_out.in_collection.exposed_attributes,
                     @associate_config_out.in_collection.exposed_associations,
                     @base_uri,
                     @associate_config_out.media_type )
      },
      :status => :ok,
      :content_type => @associate_config_out.in_collection.media_type,
      :pagination_info => pagination_info
    }

  else

    result =
      if(@config.pass_params_to.include?(@assoc) and
         reflection.options[:extend] and
         reflectin.options[:extend].detect{|e| e.method_defined? :find_by_params} )
        @record.send(@assoc).find_by_params(@params)
      else
        @record.send(@assoc)
      end

    raise ResourceNotFound if result.nil?

    {
      :json =>  result.represent( @associate_config_out.exposed_attributes,
                                  @associate_config_out.exposed_associations,
                                  @base_uri,
                                  @associate_config_out.media_type),
      :status => :ok,
      :content_type => @associate_config_out.media_type
    }
  end


rescue ActiveRecord::RecordNotFound
  raise ResourceNotFound
end

#link(link_path_info) ⇒ Object 



147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
 
# File 'lib/toast/association.rb', line 147

def link link_path_info
  slash, link_resource_name, link_id = link_path_info.split('/')
  link_model = Resource.get_class_by_resource_name(link_resource_name)
  link_record = link_model.find(link_id)

  reflection = @model.reflect_on_association(@assoc.to_sym)

  if(reflection.collection? )
    # has_many, hbtm
    if( @config.pass_params_to.include?(@assoc) and
        reflection.options[:extend] and
        reflection.options[:extend].detect{|e| e.method_defined? :<<})

      @record.send(@assoc).<<(link_record,@params)
    else
      @record.send(@assoc) << link_record
    end
  else
    # has_one, belongs_to
    @record.send(@assoc+"=",link_record)
    @record.save
  end

  {
    :nothing => true,
    :status => :no_content
  }

rescue ActiveRecord::AssociationTypeMismatch
  raise Toast::ResourceNotAcceptable
rescue ActiveRecord::RecordNotFound
  raise Toast::ResourceNotFound
rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotSaved, ActiveRecord::RecordNotUnique => e
  # model validation failed (join model used for linking)
  raise PayloadInvalid.new(e.message)
end

#post(payload, media_type) ⇒ Object

Raises:



94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
 
# File 'lib/toast/association.rb', line 94

def post payload, media_type
  raise MethodNotAllowed unless @config.writables.include? @assoc

  if media_type != @associate_config_in.media_type
    raise UnsupportedMediaType
  end

  begin
    payload = ActiveSupport::JSON.decode(payload)
  rescue
    raise PayloadFormatError
  end

  unless payload.is_a? Hash
    raise PayloadFormatError
  end

  payload.delete_if {|key,value|
    !@associate_config_in.writables.include?(key) or
    @associate_config_in.exposed_associations.include?(key)
  }

  begin
    reflection = @model.reflect_on_association(@assoc.to_sym)

    if(@config.pass_params_to.include?(@assoc) and
       reflection.options[:extend] and
       reflection.options[:extend].detect{|e| e.method_defined? :create!})

      record = @record.send(@assoc).create! payload, @params
    else
      record = @record.send(@assoc).create! payload
    end
    {
      :json => record.represent( @associate_config_out.exposed_attributes,
                                 @associate_config_out.exposed_associations,
                                 @base_uri,
                                 @associate_config_out.media_type),
      :location => self.base_uri + record.uri_path,
      :status => :created,
      :content_type => @associate_config_out.media_type
    }

  rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotSaved, ActiveRecord::RecordNotUnique => e
    # model validation failed
    raise PayloadInvalid.new(e.message)
  end
end

#put(payload, media_type) ⇒ Object

Raises:



90
91
92
 
# File 'lib/toast/association.rb', line 90

def put payload, media_type
  raise MethodNotAllowed
end

#unlink(link_path_info) ⇒ Object 



184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
 
# File 'lib/toast/association.rb', line 184

def unlink link_path_info

  slash, link_resource_name, link_id = link_path_info.split('/')
  link_model = Resource.get_class_by_resource_name(link_resource_name)
  link_record = link_model.find(link_id)

  reflection = @model.reflect_on_association(@assoc.to_sym)

  if @model.reflect_on_association(@assoc.to_sym).collection?
    # has_many, hbtm
    if( @config.pass_params_to.include?(@assoc) and
        reflection.options[:extend] and
        reflection.options[:extend].detect{|e| e.method_defined? :delete})

      @record.send(@assoc).delete(link_record,@params)
    else
      @record.send(@assoc).delete(link_record) unless link_record.nil?
    end
  else

    # has_one, belongs_to
    if @record.send(@assoc) == link_record
      @record.send(@assoc+"=",nil)
      @record.save!
    end
  end

  {
    :nothing => true,
    :status => :no_content
  }
rescue ActiveRecord::RecordNotFound
  raise ResourceNotFound
end