Class: Graphiti::Sideload

Inherits:
Object show all
Defined in:
lib/graphiti/sideload.rb

Direct Known Subclasses

BelongsTo, HasMany

Defined Under Namespace

Classes: BelongsTo, HasMany, HasOne, ManyToMany, PolymorphicBelongsTo

Constant Summary collapse

HOOK_ACTIONS = 
[:save, :create, :update, :destroy, :disassociate]
TYPES = 
[:has_many, :belongs_to, :has_one, :many_to_many]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, opts) ⇒ Sideload

Returns a new instance of Sideload.



20
21
22
23
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
 
# File 'lib/graphiti/sideload.rb', line 20

def initialize(name, opts)
  @name = name
  validate_options!(opts)
  translate_deprecated_options!(opts)
  @parent_resource_class = opts[:parent_resource]
  @resource_class_name = opts[:resource]
  @primary_key = opts[:primary_key]
  @foreign_key = opts[:foreign_key]
  @type = opts[:type]
  @base_scope = opts[:base_scope]
  @readable = opts[:readable]
  @writable = opts[:writable]
  @as = opts[:as]
  @link = opts[:link]
  unless @link.nil? || Resource::LINK_MODES.include?(@link)
    raise Errors::InvalidLinkRendering.new(@parent_resource_class, :"#{name} link", @link)
  end
  @single = opts[:single]
  @remote = opts[:remote]
  apply_belongs_to_many_filter if type == :many_to_many

  @description = opts[:description]

  # polymorphic has_many
  @polymorphic_as = opts[:polymorphic_as]
  # polymorphic_belongs_to-specific
  @group_name = opts[:group_name]
  @polymorphic_child = opts[:polymorphic_child]
  @parent = opts[:parent]
  @render_resource_ids = opts[:resource_ids]

  if polymorphic_child?
    parent.resource.polymorphic << resource_class
  end

  if remote?
    @resource_class = create_remote_resource
  end
end

Instance Attribute Details

#group_name ⇒ Object (readonly)

Returns the value of attribute group_name.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def group_name
  @group_name
end

#link ⇒ Object (readonly)

Returns the value of attribute link.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def link
  @link
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def name
  @name
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def parent
  @parent
end

#parent_resource_class ⇒ Object (readonly)

Returns the value of attribute parent_resource_class.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def parent_resource_class
  @parent_resource_class
end

#polymorphic_as ⇒ Object (readonly)

Returns the value of attribute polymorphic_as.



6
7
8
 
# File 'lib/graphiti/sideload.rb', line 6

def polymorphic_as
  @polymorphic_as
end

Class Method Details

.after_save(only: [], except: [], &blk) ⇒ Object 



363
364
365
366
367
368
369
370
 
# File 'lib/graphiti/sideload.rb', line 363

def self.after_save(only: [], except: [], &blk)
  actions = HOOK_ACTIONS - except
  actions = only & actions
  actions = [:save] if only.empty? && except.empty?
  actions.each do |a|
    hooks[:"after_#{a}"] << blk
  end
end

.assign(&blk) ⇒ Object 



64
65
66
 
# File 'lib/graphiti/sideload.rb', line 64

def self.assign(&blk)
  self.assign_proc = blk
end

.assign_each(&blk) ⇒ Object 



68
69
70
 
# File 'lib/graphiti/sideload.rb', line 68

def self.assign_each(&blk)
  self.assign_each_proc = blk
end

.hooks ⇒ Object 



372
373
374
375
376
377
378
379
 
# File 'lib/graphiti/sideload.rb', line 372

def self.hooks
  @hooks ||= {}.tap do |h|
    HOOK_ACTIONS.each do |a|
      h[:"after_#{a}"] = []
      h[:"before_#{a}"] = []
    end
  end
end

.link(&blk) ⇒ Object 



80
81
82
 
# File 'lib/graphiti/sideload.rb', line 80

def self.link(&blk)
  self.link_proc = blk
end

.params(&blk) ⇒ Object 



72
73
74
 
# File 'lib/graphiti/sideload.rb', line 72

def self.params(&blk)
  self.params_proc = blk
end

.pre_load(&blk) ⇒ Object 



76
77
78
 
# File 'lib/graphiti/sideload.rb', line 76

def self.pre_load(&blk)
  self.pre_load_proc = blk
end

.scope(&blk) ⇒ Object 



60
61
62
 
# File 'lib/graphiti/sideload.rb', line 60

def self.scope(&blk)
  self.scope_proc = blk
end

Instance Method Details

#assign(parents, children) ⇒ Object 



318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
 
# File 'lib/graphiti/sideload.rb', line 318

def assign(parents, children)
  track_associated = type == :has_one
  associated = [] if track_associated
  if performant_assign?
    map = child_map(children)
  end

  parents.each do |parent|
    relevant_children = if performant_assign?
      children_for(parent, map) || []
    else
      fire_assign_each(parent, children)
    end

    if relevant_children.is_a?(Array)
      associated |= relevant_children if track_associated
      associate_all(parent, relevant_children)
    else
      associated << relevant_children if track_associated && relevant_children
      associate(parent, relevant_children)
    end
  end
  children.replace(associated) if track_associated
end

#assign_each(parent, children) ⇒ Object 



238
239
240
 
# File 'lib/graphiti/sideload.rb', line 238

def assign_each(parent, children)
  raise "Override #assign_each in subclass"
end

#associate(parent, child) ⇒ Object 



394
395
396
 
# File 'lib/graphiti/sideload.rb', line 394

def associate(parent, child)
  parent_resource.associate(parent, child, association_name, type)
end

#associate_all(parent, children) ⇒ Object 



390
391
392
 
# File 'lib/graphiti/sideload.rb', line 390

def associate_all(parent, children)
  parent_resource.associate_all(parent, children, association_name, type)
end

#association_name ⇒ Object 



225
226
227
 
# File 'lib/graphiti/sideload.rb', line 225

def association_name
  @as || name
end

#base_scope ⇒ Object 



255
256
257
258
259
260
261
 
# File 'lib/graphiti/sideload.rb', line 255

def base_scope
  if @base_scope
    @base_scope.respond_to?(:call) ? @base_scope.call : @base_scope
  else
    resource.base_scope
  end
end

#build_resource_proxy(parents, query, graph_parent) ⇒ Object 



263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
 
# File 'lib/graphiti/sideload.rb', line 263

def build_resource_proxy(parents, query, graph_parent)
  params = nil
  opts = nil
  proxy = nil

  with_error_handling Errors::SideloadParamsError do
    params = load_params(parents, query)
    params_proc&.call(params, parents, context)
    return [] if blank_query?(params)

    opts = load_options(parents, query)
    opts[:sideload] = self
    opts[:parent] = graph_parent
  end

  with_error_handling(Errors::SideloadQueryBuildingError) do
    scope = base_scope
    scope[:foreign_key] = foreign_key if remote?
    proxy = resource.class._all(params, opts, scope)
    pre_load_proc&.call(proxy, parents)
  end

  proxy
end

#clear_resources ⇒ Object

See https://github.com/graphiti-api/graphiti/issues/186



313
314
315
316
 
# File 'lib/graphiti/sideload.rb', line 313

def clear_resources
  @resource = nil
  @parent_resource = nil
end

#create_remote_resource ⇒ Object 



84
85
86
87
88
89
90
91
92
93
94
95
96
 
# File 'lib/graphiti/sideload.rb', line 84

def create_remote_resource
  remote_url = @remote
  klass = Class.new(Graphiti::Resource) {
    self.adapter = Graphiti::Adapters::GraphitiAPI
    self.model = OpenStruct
    self.remote = remote_url
    self.validate_requests = false
    self.validate_links = false
  }
  name = "#{parent_resource_class.name}.#{@name}.remote"
  klass.class_eval("def self.name;'#{name}';end", __FILE__, __LINE__)
  klass
end

#customized_base_scope? ⇒ Boolean

Returns:

  • (Boolean) 


139
140
141
 
# File 'lib/graphiti/sideload.rb', line 139

def customized_base_scope?
  !!@base_scope
end

#default_render_resource_ids? ⇒ Boolean

Returns:

  • (Boolean) 


169
170
171
 
# File 'lib/graphiti/sideload.rb', line 169

def default_render_resource_ids?
  false
end

#description ⇒ Object 



250
251
252
253
 
# File 'lib/graphiti/sideload.rb', line 250

def description
  return @description if @description.present?
  parent_resource_class.resolve_i18n_field_description(name, field_type: :relationships)
end

#disassociate(parent, child) ⇒ Object 



398
399
400
 
# File 'lib/graphiti/sideload.rb', line 398

def disassociate(parent, child)
  parent_resource.disassociate(parent, child, association_name, type)
end

#errors ⇒ Object 



98
99
100
 
# File 'lib/graphiti/sideload.rb', line 98

def errors
  @errors ||= []
end

#fire_hooks!(parent, objects, method) ⇒ Object 



381
382
383
384
385
386
387
388
 
# File 'lib/graphiti/sideload.rb', line 381

def fire_hooks!(parent, objects, method)
  return unless self.class.hooks

  all = self.class.hooks[:"after_#{method}"] + self.class.hooks[:after_save]
  all.compact.each do |hook|
    resource.instance_exec(parent, objects, &hook)
  end
end

#foreign_key ⇒ Object 



221
222
223
 
# File 'lib/graphiti/sideload.rb', line 221

def foreign_key
  @foreign_key ||= infer_foreign_key
end

#future_resolve(parents, query, graph_parent) ⇒ Object 



351
352
353
354
355
356
357
358
359
360
361
 
# File 'lib/graphiti/sideload.rb', line 351

def future_resolve(parents, query, graph_parent)
  assert_singular!(parents)

  if self.class.scope_proc
    build_sideload_scope(parents, query, graph_parent).future_resolve do |sideload_results|
      fire_assign(parents, sideload_results)
    end
  else
    future_load(parents, query, graph_parent)
  end
end

#guarded? ⇒ Boolean

Returns:

  • (Boolean) 


114
115
116
 
# File 'lib/graphiti/sideload.rb', line 114

def guarded?
  dynamic_flag?(@readable) || dynamic_flag?(@writable)
end

#ids_for_parents(parents) ⇒ Object 



402
403
404
405
406
407
 
# File 'lib/graphiti/sideload.rb', line 402

def ids_for_parents(parents)
  parent_ids = parents.map(&primary_key)
  parent_ids.compact!
  parent_ids.uniq!
  parent_ids
end

#infer_foreign_key ⇒ Object

Override in subclass



297
298
299
300
301
302
 
# File 'lib/graphiti/sideload.rb', line 297

def infer_foreign_key
  model = parent_resource_class.model
  namespace = namespace_for(model)
  model_name = model.name.gsub("#{namespace}::", "")
  :"#{model_name.underscore}_id"
end

#link? ⇒ Boolean

Returns:

  • (Boolean) 


181
182
183
 
# File 'lib/graphiti/sideload.rb', line 181

def link?
  link_mode != false
end

#link_extra_fields ⇒ Object 



189
190
191
192
193
194
195
196
197
198
199
200
 
# File 'lib/graphiti/sideload.rb', line 189

def link_extra_fields
  return unless context&.respond_to?(:params)

  extra_fields_name = [association_name, resource.type].find { |param|
    context.params.dig(:extra_fields, param)
  }

  if extra_fields_name
    extra_fields = context.params.dig(:extra_fields, extra_fields_name)
    {resource.type => extra_fields}
  end
end

#link_filter(parents) ⇒ Object 



185
186
187
 
# File 'lib/graphiti/sideload.rb', line 185

def link_filter(parents)
  base_filter(parents)
end

#link_mode ⇒ Object

A custom link block means the author wants the link, so a false default does not silence it.



174
175
176
177
178
179
 
# File 'lib/graphiti/sideload.rb', line 174

def link_mode
  return @link unless @link.nil?

  default = @parent_resource_class.relationship_links
  (link_proc && default == false) ? true : default
end

#load(parents, query, graph_parent) ⇒ Object 



288
289
290
291
292
293
294
 
# File 'lib/graphiti/sideload.rb', line 288

def load(parents, query, graph_parent)
  if Scope.resolve_synchronously?
    build_resource_proxy(parents, query, graph_parent).to_a
  else
    future_load(parents, query, graph_parent).value!
  end
end

#load_params(parents, query) ⇒ Object 



246
247
248
 
# File 'lib/graphiti/sideload.rb', line 246

def load_params(parents, query)
  raise "Override #load_params in subclass"
end

#non_default_options ⇒ Object 



126
127
128
129
130
131
132
133
134
135
136
137
 
# File 'lib/graphiti/sideload.rb', line 126

def non_default_options
  options = {}
  options[:as] = association_name if @as
  options[:primary_key] = primary_key unless primary_key == :id
  options[:single] = true if single?
  options[:remote] = @remote if remote?
  options[:link] = @link unless @link.nil?
  options[:readable] = @readable unless @readable.nil? || @readable == true
  options[:writable] = @writable unless @writable.nil? || @writable == true
  options[:resource_ids] = @render_resource_ids unless @render_resource_ids.nil?
  options
end

#parent_resource ⇒ Object 



308
309
310
 
# File 'lib/graphiti/sideload.rb', line 308

def parent_resource
  @parent_resource ||= parent_resource_class.new
end

#performant_assign? ⇒ Boolean

Returns:

  • (Boolean) 


409
410
411
 
# File 'lib/graphiti/sideload.rb', line 409

def performant_assign?
  !self.class.assign_each_proc
end

#polymorphic_child? ⇒ Boolean

Returns:

  • (Boolean) 


213
214
215
 
# File 'lib/graphiti/sideload.rb', line 213

def polymorphic_child?
  !!@polymorphic_child
end

#polymorphic_has_many? ⇒ Boolean

Returns:

  • (Boolean) 


151
152
153
 
# File 'lib/graphiti/sideload.rb', line 151

def polymorphic_has_many?
  !!@polymorphic_as
end

#polymorphic_has_one? ⇒ Boolean

Returns:

  • (Boolean) 


147
148
149
 
# File 'lib/graphiti/sideload.rb', line 147

def polymorphic_has_one?
  !!@polymorphic_as
end

#polymorphic_parent? ⇒ Boolean

Returns:

  • (Boolean) 


209
210
211
 
# File 'lib/graphiti/sideload.rb', line 209

def polymorphic_parent?
  resource.polymorphic?
end

#primary_key ⇒ Object 



217
218
219
 
# File 'lib/graphiti/sideload.rb', line 217

def primary_key
  @primary_key ||= :id
end

#readable? ⇒ Boolean

Returns:

  • (Boolean) 


106
107
108
 
# File 'lib/graphiti/sideload.rb', line 106

def readable?
  evaluate_flag @readable
end

#readable_guard_name ⇒ Object 



122
123
124
 
# File 'lib/graphiti/sideload.rb', line 122

def readable_guard_name
  @readable.to_sym if @readable.is_a?(Symbol) || @readable.is_a?(String)
end

#readable_guarded? ⇒ Boolean

Returns:

  • (Boolean) 


118
119
120
 
# File 'lib/graphiti/sideload.rb', line 118

def readable_guarded?
  dynamic_flag?(@readable)
end

#remote? ⇒ Boolean

Returns:

  • (Boolean) 


102
103
104
 
# File 'lib/graphiti/sideload.rb', line 102

def remote?
  !!@remote
end

#render_resource_ids? ⇒ Boolean

Returns:

  • (Boolean) 


163
164
165
166
167
 
# File 'lib/graphiti/sideload.rb', line 163

def render_resource_ids?
  return !!@render_resource_ids unless @render_resource_ids.nil?

  default_render_resource_ids?
end

#resolve(parents, query, graph_parent) ⇒ Object 



343
344
345
346
347
348
349
 
# File 'lib/graphiti/sideload.rb', line 343

def resolve(parents, query, graph_parent)
  if Scope.resolve_synchronously?
    sync_resolve(parents, query, graph_parent)
  else
    future_resolve(parents, query, graph_parent).value!
  end
end

#resource ⇒ Object 



304
305
306
 
# File 'lib/graphiti/sideload.rb', line 304

def resource
  @resource ||= resource_class.new
end

#resource_class ⇒ Object 



229
230
231
232
 
# File 'lib/graphiti/sideload.rb', line 229

def resource_class
  @resource_class ||= (@resource_class_name.is_a?(String) ? @resource_class_name.constantize : @resource_class_name) ||
    infer_resource_class
end

#resource_class_loaded? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean) 


414
415
416
417
418
419
 
# File 'lib/graphiti/sideload.rb', line 414

def resource_class_loaded?
  resource_class
  true
rescue Graphiti::Errors::ResourceNotFound
  false
end

#resource_ids_blocker ⇒ Object 



159
160
161
 
# File 'lib/graphiti/sideload.rb', line 159

def resource_ids_blocker
  :no_foreign_key_on_parent
end

#resource_ids_from_foreign_key? ⇒ Boolean

Returns:

  • (Boolean) 


155
156
157
 
# File 'lib/graphiti/sideload.rb', line 155

def resource_ids_from_foreign_key?
  resource_ids_blocker.nil?
end

#scope(parents) ⇒ Object 



234
235
236
 
# File 'lib/graphiti/sideload.rb', line 234

def scope(parents)
  raise "No #scope defined for sideload with name '#{name}'. Make sure to define this in your adapter, or pass a block that defines the scope."
end

#shared_remote? ⇒ Boolean

The parent resource is a remote, AND the sideload is a remote to the same endpoint

Returns:

  • (Boolean) 


204
205
206
207
 
# File 'lib/graphiti/sideload.rb', line 204

def shared_remote?
  resource.remote? &&
    resource.remote_base_url = parent_resource_class.remote_base_url
end

#single? ⇒ Boolean

Returns:

  • (Boolean) 


143
144
145
 
# File 'lib/graphiti/sideload.rb', line 143

def single?
  !!@single
end

#type ⇒ Object 



242
243
244
 
# File 'lib/graphiti/sideload.rb', line 242

def type
  @type || raise("Override #type in subclass. Should be one of #{TYPES.inspect}")
end

#writable? ⇒ Boolean

Returns:

  • (Boolean) 


110
111
112
 
# File 'lib/graphiti/sideload.rb', line 110

def writable?
  evaluate_flag @writable
end