Class: JSONAPI::Resource

Inherits:
Object
  • Object
show all
Includes:
ResourceFor
Defined in:
lib/jsonapi/resource.rb

Constant Summary collapse

@@resource_types = 
{}

Class Attribute Summary collapse

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ResourceFor

included

Constructor Details

#initialize(model, context = nil) ⇒ Resource

Returns a new instance of Resource.



14
15
16
17
 
# File 'lib/jsonapi/resource.rb', line 14

def initialize(model, context = nil)
  @model = model
  @context = context
end

Class Attribute Details

._allowed_filters ⇒ Object

Returns the value of attribute _allowed_filters.



136
137
138
 
# File 'lib/jsonapi/resource.rb', line 136

def _allowed_filters
  @_allowed_filters
end

._associations ⇒ Object

Returns the value of attribute _associations.



136
137
138
 
# File 'lib/jsonapi/resource.rb', line 136

def _associations
  @_associations
end

._attributes ⇒ Object

Returns the value of attribute _attributes.



136
137
138
 
# File 'lib/jsonapi/resource.rb', line 136

def _attributes
  @_attributes
end

._type ⇒ Object

Returns the value of attribute _type.



136
137
138
 
# File 'lib/jsonapi/resource.rb', line 136

def _type
  @_type
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



11
12
13
 
# File 'lib/jsonapi/resource.rb', line 11

def context
  @context
end

#model ⇒ Object (readonly)

Returns the value of attribute model.



12
13
14
 
# File 'lib/jsonapi/resource.rb', line 12

def model
  @model
end

Class Method Details

._allowed_filter?(filter) ⇒ Boolean

:nocov:

Returns:

  • (Boolean) 


385
386
387
 
# File 'lib/jsonapi/resource.rb', line 385

def _allowed_filter?(filter)
  _allowed_filters.include?(filter)
end

._as_parent_key ⇒ Object 



356
357
358
 
# File 'lib/jsonapi/resource.rb', line 356

def _as_parent_key
  @_as_parent_key ||= "#{_type.to_s.singularize}_#{_primary_key}"
end

._association(type) ⇒ Object 



336
337
338
339
 
# File 'lib/jsonapi/resource.rb', line 336

def _association(type)
  type = type.to_sym
  @_associations[type]
end

._attribute_options(attr) ⇒ Object

quasi private class methods



316
317
318
 
# File 'lib/jsonapi/resource.rb', line 316

def _attribute_options(attr)
  default_attribute_options.merge(@_attributes[attr])
end

._has_association?(type) ⇒ Boolean

Returns:

  • (Boolean) 


331
332
333
334
 
# File 'lib/jsonapi/resource.rb', line 331

def _has_association?(type)
  type = type.to_s
  @_associations.has_key?(type.singularize.to_sym) || @_associations.has_key?(type.pluralize.to_sym)
end

._key ⇒ Object 



345
346
347
348
349
350
 
# File 'lib/jsonapi/resource.rb', line 345

def _key
  # :nocov:
  warn '[DEPRECATION] `_key` is deprecated.  Please use `_primary_key` instead.'
  _primary_key
  # :nocov:
end

._model_name ⇒ Object 



341
342
343
 
# File 'lib/jsonapi/resource.rb', line 341

def _model_name
  @_model_name ||= self.name.demodulize.sub(/Resource$/, '')
end

._primary_key ⇒ Object 



352
353
354
 
# File 'lib/jsonapi/resource.rb', line 352

def _primary_key
  @_primary_key ||= :id
end

._resource_name_from_type(type) ⇒ Object 



364
365
366
367
368
369
370
371
 
# File 'lib/jsonapi/resource.rb', line 364

def _resource_name_from_type(type)
  class_name = @@resource_types[type]
  if class_name.nil?
    class_name = type.to_s.singularize.camelize + 'Resource'
    @@resource_types[type] = class_name
  end
  return class_name
end

._updateable_associations ⇒ Object 



320
321
322
323
324
325
326
327
328
329
 
# File 'lib/jsonapi/resource.rb', line 320

def _updateable_associations
  associations = []

  @_associations.each do |key, association|
    if association.is_a?(JSONAPI::Association::HasOne) || association.acts_as_set
      associations.push(key)
    end
  end
  associations
end

.attribute(attr, options = {}) ⇒ Object 



161
162
163
164
165
166
167
168
169
170
 
# File 'lib/jsonapi/resource.rb', line 161

def attribute(attr, options = {})
  @_attributes[attr] = options
  define_method attr do
    @model.send(attr)
  end unless method_defined?(attr)

  define_method "#{attr}=" do |value|
    @model.send "#{attr}=", value
  end unless method_defined?("#{attr}=")
end

.attributes(*attrs) ⇒ Object

Methods used in defining a resource class



155
156
157
158
159
 
# File 'lib/jsonapi/resource.rb', line 155

def attributes(*attrs)
  attrs.each do |attr|
    attribute(attr)
  end
end

.create(context) ⇒ Object 



138
139
140
 
# File 'lib/jsonapi/resource.rb', line 138

def create(context)
  self.new(self.create_model, context)
end

.create_model ⇒ Object 



142
143
144
 
# File 'lib/jsonapi/resource.rb', line 142

def create_model
  _model_class.new
end

.createable_fields(context = nil) ⇒ Object

Override in your resource to filter the createable keys



213
214
215
 
# File 'lib/jsonapi/resource.rb', line 213

def createable_fields(context = nil)
  _updateable_associations | _attributes.keys
end

.default_attribute_options ⇒ Object 



172
173
174
 
# File 'lib/jsonapi/resource.rb', line 172

def default_attribute_options
  {format: :default}
end

.fields ⇒ Object 



222
223
224
 
# File 'lib/jsonapi/resource.rb', line 222

def fields
  _associations.keys | _attributes.keys
end

.filter(attr) ⇒ Object 



192
193
194
 
# File 'lib/jsonapi/resource.rb', line 192

def filter(attr)
  @_allowed_filters.add(attr.to_sym)
end

.filters(*attrs) ⇒ Object 



188
189
190
 
# File 'lib/jsonapi/resource.rb', line 188

def filters(*attrs)
  @_allowed_filters.merge(attrs)
end

.find(filters, options = {}) ⇒ Object

Override this method if you have more complex requirements than this basic find method provides



227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
 
# File 'lib/jsonapi/resource.rb', line 227

def find(filters, options = {})
  context = options[:context]
  sort_params = options.fetch(:sort_params) { [] }
  includes = []
  where_filters = {}

  filters.each do |filter, value|
    if _associations.include?(filter)
      if _associations[filter].is_a?(JSONAPI::Association::HasMany)
        includes.push(filter)
        where_filters["#{filter}.#{_associations[filter].primary_key}"] = value
      else
        where_filters["#{_associations[filter].foreign_key}"] = value
      end
    else
      where_filters[filter] = value
    end
  end

  resources = []
  order_options = construct_order_options(sort_params)
  _model_class.where(where_filters).order(order_options).includes(includes).each do |model|
    resources.push self.new(model, context)
  end

  return resources
end

.find_by_key(key, options = {}) ⇒ Object 



255
256
257
258
259
260
261
262
 
# File 'lib/jsonapi/resource.rb', line 255

def find_by_key(key, options = {})
  context = options[:context]
  model = _model_class.where({_primary_key => key}).first
  if model.nil?
    raise JSONAPI::Exceptions::RecordNotFound.new(key)
  end
  self.new(model, context)
end

.find_by_keys(keys, options = {}) ⇒ Object 



264
265
266
267
268
269
270
271
272
273
274
 
# File 'lib/jsonapi/resource.rb', line 264

def find_by_keys(keys, options = {})
  context = options[:context]
  _models = _model_class.where({_primary_key => keys})

  unless _models.length == keys.length
    key = (keys - _models.pluck(:id).map(&:to_s)).first
    raise JSONAPI::Exceptions::RecordNotFound.new(key)
  end

  _models.map { |model| self.new(model, context) }
end

.has_many(*attrs) ⇒ Object 



180
181
182
 
# File 'lib/jsonapi/resource.rb', line 180

def has_many(*attrs)
  _associate(Association::HasMany, *attrs)
end

.has_one(*attrs) ⇒ Object 



176
177
178
 
# File 'lib/jsonapi/resource.rb', line 176

def has_one(*attrs)
  _associate(Association::HasOne, *attrs)
end

.inherited(base) ⇒ Object 



123
124
125
126
127
128
129
130
131
132
133
134
 
# File 'lib/jsonapi/resource.rb', line 123

def inherited(base)
  base._attributes = (_attributes || {}).dup
  base._associations = (_associations || {}).dup
  base._allowed_filters = (_allowed_filters || Set.new).dup

  type = base.name.demodulize.sub(/Resource$/, '').underscore
  base._type = type.pluralize.to_sym
  # If eager loading is on this is how all the resource types are setup
  # If eager loading is off some resource types will be initialized in
  # _resource_name_from_type
  @@resource_types[base._type] ||= base.name.demodulize
end

.is_filter_association?(filter) ⇒ Boolean

Returns:

  • (Boolean) 


285
286
287
 
# File 'lib/jsonapi/resource.rb', line 285

def is_filter_association?(filter)
  filter == _type || _associations.include?(filter)
end

.key(key) ⇒ Object 



196
197
198
199
200
201
 
# File 'lib/jsonapi/resource.rb', line 196

def key(key)
  # :nocov:
  warn '[DEPRECATION] `key` is deprecated.  Please use `primary_key` instead.'
  @_primary_key = key.to_sym
  # :nocov:
end

.model_name(model) ⇒ Object 



184
185
186
 
# File 'lib/jsonapi/resource.rb', line 184

def model_name(model)
  @_model_name = model.to_sym
end

.primary_key(key) ⇒ Object 



203
204
205
 
# File 'lib/jsonapi/resource.rb', line 203

def primary_key(key)
  @_primary_key = key.to_sym
end

.routing_options(options) ⇒ Object 



146
147
148
 
# File 'lib/jsonapi/resource.rb', line 146

def routing_options(options)
  @_routing_resource_options = options
end

.routing_resource_options ⇒ Object 



150
151
152
 
# File 'lib/jsonapi/resource.rb', line 150

def routing_resource_options
  @_routing_resource_options ||= {}
end

.sortable_fields(context = nil) ⇒ Object

Override in your resource to filter the sortable keys



218
219
220
 
# File 'lib/jsonapi/resource.rb', line 218

def sortable_fields(context = nil)
  _attributes.keys
end

.updateable_fields(context = nil) ⇒ Object

Override in your resource to filter the updateable keys



208
209
210
 
# File 'lib/jsonapi/resource.rb', line 208

def updateable_fields(context = nil)
  _updateable_associations | _attributes.keys
end

.verify_association_filter(filter, raw, context = nil) ⇒ Object

override to allow for custom association logic, such as uuids, multiple keys or permission checks on keys



311
312
313
 
# File 'lib/jsonapi/resource.rb', line 311

def verify_association_filter(filter, raw, context = nil)
  return filter, raw
end

.verify_custom_filter(filter, value, context = nil) ⇒ Object

override to allow for custom filters



306
307
308
 
# File 'lib/jsonapi/resource.rb', line 306

def verify_custom_filter(filter, value, context = nil)
  return filter, value
end

.verify_filter(filter, raw, context = nil) ⇒ Object 



289
290
291
292
293
294
295
296
297
298
 
# File 'lib/jsonapi/resource.rb', line 289

def verify_filter(filter, raw, context = nil)
  filter_values = []
  filter_values += CSV.parse_line(raw) unless raw.nil? || raw.empty?

  if is_filter_association?(filter)
    verify_association_filter(filter, filter_values, context)
  else
    verify_custom_filter(filter, filter_values, context)
  end
end

.verify_filters(filters, context = nil) ⇒ Object 



276
277
278
279
280
281
282
283
 
# File 'lib/jsonapi/resource.rb', line 276

def verify_filters(filters, context = nil)
  verified_filters = {}
  filters.each do |filter, raw_value|
    verified_filter = verify_filter(filter, raw_value, context)
    verified_filters[verified_filter[0]] = verified_filter[1]
  end
  verified_filters
end

.verify_key(key, context = nil) ⇒ Object

override to allow for key processing and checking



301
302
303
 
# File 'lib/jsonapi/resource.rb', line 301

def verify_key(key, context = nil)
  return key
end

Instance Method Details

#_model_class ⇒ Object 



375
376
377
 
# File 'lib/jsonapi/resource.rb', line 375

def _model_class
  @model ||= Object.const_get(_model_name.to_s)
end

#create_has_many_link(association_type, association_key_value) ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/jsonapi/resource.rb', line 27

def create_has_many_link(association_type, association_key_value)
  association = self.class._associations[association_type]
  related_resource = self.class.resource_for(association.type).find_by_key(association_key_value, context: @context)

  # ToDo: Add option to skip relations that already exist instead of returning an error?
  relation = @model.send(association.type).where(association.primary_key => association_key_value).first
  if relation.nil?
    @model.send(association.type) << related_resource.model
  else
    raise JSONAPI::Exceptions::HasManyRelationExists.new(association_key_value)
  end
end

#create_has_one_link(association_type, association_key_value) ⇒ Object 



46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/jsonapi/resource.rb', line 46

def create_has_one_link(association_type, association_key_value)
  association = self.class._associations[association_type]

  # ToDo: Add option to skip relations that already exist instead of returning an error?
  relation = @model.send("#{association.foreign_key}")
  if relation.nil?
    send("#{association.foreign_key}=", association_key_value)
  else
    raise JSONAPI::Exceptions::HasOneRelationExists.new
  end
end

#fetchable_fields ⇒ Object

Override this on a resource instance to override the fetchable keys



118
119
120
 
# File 'lib/jsonapi/resource.rb', line 118

def fetchable_fields
  self.class.fields
end

#id ⇒ Object 



23
24
25
 
# File 'lib/jsonapi/resource.rb', line 23

def id
  model.send(self.class._primary_key)
end

#remove ⇒ Object 



19
20
21
 
# File 'lib/jsonapi/resource.rb', line 19

def remove
  @model.destroy
end

#remove_has_many_link(association_type, key) ⇒ Object 



64
65
66
67
68
 
# File 'lib/jsonapi/resource.rb', line 64

def remove_has_many_link(association_type, key)
  association = self.class._associations[association_type]

  @model.send(association.type).delete(key)
end

#remove_has_one_link(association_type) ⇒ Object 



70
71
72
73
74
 
# File 'lib/jsonapi/resource.rb', line 70

def remove_has_one_link(association_type)
  association = self.class._associations[association_type]

  send("#{association.foreign_key}=", nil)
end

#replace_fields(field_data) ⇒ Object 



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
 
# File 'lib/jsonapi/resource.rb', line 76

def replace_fields(field_data)
  field_data[:attributes].each do |attribute, value|
    begin
      send "#{attribute}=", value
    rescue ArgumentError
      # :nocov: Will be thrown if an enum value isn't allowed for an enum. Currently not tested as enums are a rails 4.1 and higher feature
      raise JSONAPI::Exceptions::InvalidFieldValue.new(attribute, value)
      # :nocov:
    end
  end

  field_data[:has_one].each do |association_type, value|
    if value.nil?
      remove_has_one_link(association_type)
    else
      replace_has_one_link(association_type, value)
    end
  end if field_data[:has_one]

  field_data[:has_many].each do |association_type, values|
    replace_has_many_links(association_type, values)
  end if field_data[:has_many]
end

#replace_has_many_links(association_type, association_key_values) ⇒ Object 



40
41
42
43
44
 
# File 'lib/jsonapi/resource.rb', line 40

def replace_has_many_links(association_type, association_key_values)
  association = self.class._associations[association_type]

  send("#{association.foreign_key}=", association_key_values)
end

#replace_has_one_link(association_type, association_key_value) ⇒ Object 



58
59
60
61
62
 
# File 'lib/jsonapi/resource.rb', line 58

def replace_has_one_link(association_type, association_key_value)
  association = self.class._associations[association_type]

  send("#{association.foreign_key}=", association_key_value)
end

#save ⇒ Object 



100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
 
# File 'lib/jsonapi/resource.rb', line 100

def save
  @model.save!
rescue ActiveRecord::RecordInvalid => e
  errors = []
  e.record.errors.messages.each do |element|
    element[1].each do |message|
      errors.push(JSONAPI::Error.new(
                      code: JSONAPI::VALIDATION_ERROR,
                      status: :bad_request,
                      title: "#{element[0]} - #{message}",
                      detail: "can't be blank",
                      path: "\\#{element[0]}"))
    end
  end
  raise JSONAPI::Exceptions::ValidationErrors.new(errors)
end