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

def initialize(name, opts)
  @name = name
  validate_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]
  @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]
  @always_include_resource_ids = opts[:always_include_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 



315
316
317
318
319
320
321
322
 
# File 'lib/graphiti/sideload.rb', line 315

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 



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

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

.assign_each(&blk) ⇒ Object 



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

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

.hooks ⇒ Object 



324
325
326
327
328
329
330
331
 
# File 'lib/graphiti/sideload.rb', line 324

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

.link(&blk) ⇒ Object 



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

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

.params(&blk) ⇒ Object 



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

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

.pre_load(&blk) ⇒ Object 



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

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

.scope(&blk) ⇒ Object 



56
57
58
 
# File 'lib/graphiti/sideload.rb', line 56

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

Instance Method Details

#always_include_resource_ids? ⇒ Boolean

Returns:

  • (Boolean) 


125
126
127
 
# File 'lib/graphiti/sideload.rb', line 125

def always_include_resource_ids?
  !!@always_include_resource_ids
end

#assign(parents, children) ⇒ Object 



268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
 
# File 'lib/graphiti/sideload.rb', line 268

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 



192
193
194
 
# File 'lib/graphiti/sideload.rb', line 192

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

#associate(parent, child) ⇒ Object 



346
347
348
 
# File 'lib/graphiti/sideload.rb', line 346

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

#associate_all(parent, children) ⇒ Object 



342
343
344
 
# File 'lib/graphiti/sideload.rb', line 342

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

#association_name ⇒ Object 



179
180
181
 
# File 'lib/graphiti/sideload.rb', line 179

def association_name
  @as || name
end

#base_scope ⇒ Object 



209
210
211
212
213
214
215
 
# File 'lib/graphiti/sideload.rb', line 209

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 



217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
 
# File 'lib/graphiti/sideload.rb', line 217

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



263
264
265
266
 
# File 'lib/graphiti/sideload.rb', line 263

def clear_resources
  @resource = nil
  @parent_resource = nil
end

#create_remote_resource ⇒ Object 



80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'lib/graphiti/sideload.rb', line 80

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_endpoints = false
  }
  name = "#{parent_resource_class.name}.#{@name}.remote"
  klass.class_eval("def self.name;'#{name}';end", __FILE__, __LINE__)
  klass
end

#description ⇒ Object 



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

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

#disassociate(parent, child) ⇒ Object 



350
351
352
 
# File 'lib/graphiti/sideload.rb', line 350

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

#errors ⇒ Object 



93
94
95
 
# File 'lib/graphiti/sideload.rb', line 93

def errors
  @errors ||= []
end

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



333
334
335
336
337
338
339
340
 
# File 'lib/graphiti/sideload.rb', line 333

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 



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

def foreign_key
  @foreign_key ||= infer_foreign_key
end

#future_resolve(parents, query, graph_parent) ⇒ Object 



293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
 
# File 'lib/graphiti/sideload.rb', line 293

def future_resolve(parents, query, graph_parent)
  if single? && parents.length > 1
    raise Errors::SingularSideload.new(self, parents.length)
  end

  if self.class.scope_proc
    sideload_scope = fire_scope(parents)
    sideload_scope = Scope.new sideload_scope,
      resource,
      query,
      parent: graph_parent,
      sideload: self,
      sideload_parent_length: parents.length,
      default_paginate: false
    sideload_scope.future_resolve do |sideload_results|
      fire_assign(parents, sideload_results)
    end
  else
    future_load(parents, query, graph_parent)
  end
end

#guarded? ⇒ Boolean

Returns:

  • (Boolean) 


109
110
111
 
# File 'lib/graphiti/sideload.rb', line 109

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

#ids_for_parents(parents) ⇒ Object 



354
355
356
357
358
359
 
# File 'lib/graphiti/sideload.rb', line 354

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



247
248
249
250
251
252
 
# File 'lib/graphiti/sideload.rb', line 247

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) 


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

def link?
  return true if link_proc

  if @link.nil?
    !!@parent_resource_class.autolink
  else
    !!@link
  end
end

#link_extra_fields ⇒ Object 



143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/graphiti/sideload.rb', line 143

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 



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

def link_filter(parents)
  base_filter(parents)
end

#load(parents, query, graph_parent) ⇒ Object 



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

def load(parents, query, graph_parent)
  future_load(parents, query, graph_parent).value!
end

#load_params(parents, query) ⇒ Object 



200
201
202
 
# File 'lib/graphiti/sideload.rb', line 200

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

#parent_resource ⇒ Object 



258
259
260
 
# File 'lib/graphiti/sideload.rb', line 258

def parent_resource
  @parent_resource ||= parent_resource_class.new
end

#performant_assign? ⇒ Boolean

Returns:

  • (Boolean) 


361
362
363
 
# File 'lib/graphiti/sideload.rb', line 361

def performant_assign?
  !self.class.assign_each_proc
end

#polymorphic_child? ⇒ Boolean

Returns:

  • (Boolean) 


167
168
169
 
# File 'lib/graphiti/sideload.rb', line 167

def polymorphic_child?
  !!@polymorphic_child
end

#polymorphic_has_many? ⇒ Boolean

Returns:

  • (Boolean) 


121
122
123
 
# File 'lib/graphiti/sideload.rb', line 121

def polymorphic_has_many?
  !!@polymorphic_as
end

#polymorphic_has_one? ⇒ Boolean

Returns:

  • (Boolean) 


117
118
119
 
# File 'lib/graphiti/sideload.rb', line 117

def polymorphic_has_one?
  !!@polymorphic_as
end

#polymorphic_parent? ⇒ Boolean

Returns:

  • (Boolean) 


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

def polymorphic_parent?
  resource.polymorphic?
end

#primary_key ⇒ Object 



171
172
173
 
# File 'lib/graphiti/sideload.rb', line 171

def primary_key
  @primary_key ||= :id
end

#readable? ⇒ Boolean

Returns:

  • (Boolean) 


101
102
103
 
# File 'lib/graphiti/sideload.rb', line 101

def readable?
  evaluate_flag @readable
end

#remote? ⇒ Boolean

Returns:

  • (Boolean) 


97
98
99
 
# File 'lib/graphiti/sideload.rb', line 97

def remote?
  !!@remote
end

#resource ⇒ Object 



254
255
256
 
# File 'lib/graphiti/sideload.rb', line 254

def resource
  @resource ||= resource_class.new
end

#resource_class ⇒ Object 



183
184
185
186
 
# File 'lib/graphiti/sideload.rb', line 183

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) 


366
367
368
369
370
371
 
# File 'lib/graphiti/sideload.rb', line 366

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

#scope(parents) ⇒ Object 



188
189
190
 
# File 'lib/graphiti/sideload.rb', line 188

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) 


158
159
160
161
 
# File 'lib/graphiti/sideload.rb', line 158

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

#single? ⇒ Boolean

Returns:

  • (Boolean) 


113
114
115
 
# File 'lib/graphiti/sideload.rb', line 113

def single?
  !!@single
end

#type ⇒ Object 



196
197
198
 
# File 'lib/graphiti/sideload.rb', line 196

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

#writable? ⇒ Boolean

Returns:

  • (Boolean) 


105
106
107
 
# File 'lib/graphiti/sideload.rb', line 105

def writable?
  evaluate_flag @writable
end