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.



128
129
130
 
# File 'lib/jsonapi/resource.rb', line 128

def _allowed_filters
  @_allowed_filters
end

._associations ⇒ Object

Returns the value of attribute _associations.



128
129
130
 
# File 'lib/jsonapi/resource.rb', line 128

def _associations
  @_associations
end

._attributes ⇒ Object

Returns the value of attribute _attributes.



128
129
130
 
# File 'lib/jsonapi/resource.rb', line 128

def _attributes
  @_attributes
end

._type ⇒ Object

Returns the value of attribute _type.



128
129
130
 
# File 'lib/jsonapi/resource.rb', line 128

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) 


397
398
399
 
# File 'lib/jsonapi/resource.rb', line 397

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

._as_parent_key ⇒ Object 



368
369
370
 
# File 'lib/jsonapi/resource.rb', line 368

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

._association(type) ⇒ Object 



348
349
350
351
 
# File 'lib/jsonapi/resource.rb', line 348

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

._attribute_options(attr) ⇒ Object

quasi private class methods



328
329
330
 
# File 'lib/jsonapi/resource.rb', line 328

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

._has_association?(type) ⇒ Boolean

Returns:

  • (Boolean) 


343
344
345
346
 
# File 'lib/jsonapi/resource.rb', line 343

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 



357
358
359
360
361
362
 
# File 'lib/jsonapi/resource.rb', line 357

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

._model_name ⇒ Object 



353
354
355
 
# File 'lib/jsonapi/resource.rb', line 353

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

._primary_key ⇒ Object 



364
365
366
 
# File 'lib/jsonapi/resource.rb', line 364

def _primary_key
  @_primary_key ||= :id
end

._resource_name_from_type(type) ⇒ Object 



376
377
378
379
380
381
382
383
 
# File 'lib/jsonapi/resource.rb', line 376

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 



332
333
334
335
336
337
338
339
340
341
 
# File 'lib/jsonapi/resource.rb', line 332

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

.apply_filter(records, filter, value) ⇒ Object 



220
221
222
 
# File 'lib/jsonapi/resource.rb', line 220

def apply_filter(records, filter, value)
  records.where(filter => value)
end

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



153
154
155
156
157
158
159
160
161
162
163
164
 
# File 'lib/jsonapi/resource.rb', line 153

def attribute(attr, options = {})
  check_reserved_attribute_name(attr)

  @_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



147
148
149
150
151
 
# File 'lib/jsonapi/resource.rb', line 147

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

.create(context) ⇒ Object 



130
131
132
 
# File 'lib/jsonapi/resource.rb', line 130

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

.create_model ⇒ Object 



134
135
136
 
# File 'lib/jsonapi/resource.rb', line 134

def create_model
  _model_class.new
end

.createable_fields(context = nil) ⇒ Object

Override in your resource to filter the createable keys



207
208
209
 
# File 'lib/jsonapi/resource.rb', line 207

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

.default_attribute_options ⇒ Object 



166
167
168
 
# File 'lib/jsonapi/resource.rb', line 166

def default_attribute_options
  {format: :default}
end

.fields ⇒ Object 



216
217
218
 
# File 'lib/jsonapi/resource.rb', line 216

def fields
  _associations.keys | _attributes.keys
end

.filter(attr) ⇒ Object 



186
187
188
 
# File 'lib/jsonapi/resource.rb', line 186

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

.filters(*attrs) ⇒ Object 



182
183
184
 
# File 'lib/jsonapi/resource.rb', line 182

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



225
226
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
 
# File 'lib/jsonapi/resource.rb', line 225

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

  records = records(options)

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

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

  return resources
end

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



254
255
256
257
258
259
260
261
 
# File 'lib/jsonapi/resource.rb', line 254

def find_by_key(key, options = {})
  context = options[:context]
  model = records(options).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 



263
264
265
266
267
268
269
270
271
272
273
 
# File 'lib/jsonapi/resource.rb', line 263

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

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

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

.has_many(*attrs) ⇒ Object 



174
175
176
 
# File 'lib/jsonapi/resource.rb', line 174

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

.has_one(*attrs) ⇒ Object 



170
171
172
 
# File 'lib/jsonapi/resource.rb', line 170

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

.inherited(base) ⇒ Object 



112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
 
# File 'lib/jsonapi/resource.rb', line 112

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

  check_reserved_resource_name(base._type, base.name)

  # 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) 


290
291
292
 
# File 'lib/jsonapi/resource.rb', line 290

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

.key(key) ⇒ Object 



190
191
192
193
194
195
 
# File 'lib/jsonapi/resource.rb', line 190

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 



178
179
180
 
# File 'lib/jsonapi/resource.rb', line 178

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

.primary_key(key) ⇒ Object 



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

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

.records(options = {}) ⇒ Object

Override this method if you want to customize the relation for finder methods (find, find_by_key, find_by_keys)



277
278
279
 
# File 'lib/jsonapi/resource.rb', line 277

def records(options = {})
  _model_class
end

.routing_options(options) ⇒ Object 



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

def routing_options(options)
  @_routing_resource_options = options
end

.routing_resource_options ⇒ Object 



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

def routing_resource_options
  @_routing_resource_options ||= {}
end

.sortable_fields(context = nil) ⇒ Object

Override in your resource to filter the sortable keys



212
213
214
 
# File 'lib/jsonapi/resource.rb', line 212

def sortable_fields(context = nil)
  _attributes.keys
end

.updateable_fields(context = nil) ⇒ Object

Override in your resource to filter the updateable keys



202
203
204
 
# File 'lib/jsonapi/resource.rb', line 202

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



323
324
325
 
# File 'lib/jsonapi/resource.rb', line 323

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



318
319
320
 
# File 'lib/jsonapi/resource.rb', line 318

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

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



294
295
296
297
298
299
300
301
302
303
 
# File 'lib/jsonapi/resource.rb', line 294

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 



281
282
283
284
285
286
287
288
 
# File 'lib/jsonapi/resource.rb', line 281

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



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

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

.verify_keys(keys, context = nil) ⇒ Object

override to allow for key processing and checking



311
312
313
314
315
 
# File 'lib/jsonapi/resource.rb', line 311

def verify_keys(keys, context = nil)
  return keys.collect do |key|
    verify_key(key, context)
  end
end

Instance Method Details

#_model_class ⇒ Object 



387
388
389
 
# File 'lib/jsonapi/resource.rb', line 387

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



107
108
109
 
# File 'lib/jsonapi/resource.rb', line 107

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
 
# File 'lib/jsonapi/resource.rb', line 100

def save
  @model.save!
rescue ActiveRecord::RecordInvalid => e
  raise JSONAPI::Exceptions::ValidationErrors.new(e.record.errors.messages)
end