Module: RESTFramework::Utils

Defined in:
lib/rest_framework/utils.rb

Constant Summary collapse

HTTP_VERB_ORDERING = 
%w[GET POST PUT PATCH DELETE OPTIONS HEAD]

Class Method Summary collapse

Class Method Details

.comparable_path(path) ⇒ Object

Normalize a path pattern by replacing URL params with generic placeholder, and removing the ‘(.:format)` at the end.



60
61
62
 
# File 'lib/rest_framework/utils.rb', line 60

def self.comparable_path(path)
  path.gsub("(.:format)", "").gsub(/:[0-9A-Za-z_-]+/, ":x")
end

.fields_for(model, exclude_associations:, action_text:, active_storage:) ⇒ Object

Get the fields for a given model, including not just columns (which includes foreign keys), but also associations. Note that we always return an array of strings, not symbols.



167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
 
# File 'lib/rest_framework/utils.rb', line 167

def self.fields_for(model, exclude_associations:, action_text:, active_storage:)
  foreign_keys = model.reflect_on_all_associations(:belongs_to).map(&:foreign_key)
  base_fields = model.column_names.reject { |c| c.in?(foreign_keys) }

  return base_fields if exclude_associations

  # ActionText Integration: Determine the normalized field names for action text attributes.
  atf = action_text ? model.reflect_on_all_associations(:has_one).collect(&:name).select { |n|
    n.to_s.start_with?("rich_text_")
  }.map { |n| n.to_s.delete_prefix("rich_text_") } : []

  # ActiveStorage Integration: Determine the normalized field names for active storage attributes.
  asf = active_storage ? model.attachment_reflections.keys : []

  # Associations:
  associations = model.reflections.map { |association, ref|
    # Ignore associations for which we have custom integrations.
    if ref.class_name.in?(%w[ActionText::RichText ActiveStorage::Attachment ActiveStorage::Blob])
      next nil
    end

    if ref.collection? && RESTFramework.config.large_reverse_association_tables&.include?(
      ref.table_name,
    )
      next nil
    end

    next association
  }.compact

  base_fields + associations + atf + asf
end

.get_request_route(application_routes, request) ⇒ Object

Get the first route pattern which matches the given request.



54
55
56
 
# File 'lib/rest_framework/utils.rb', line 54

def self.get_request_route(application_routes, request)
  application_routes.router.recognize(request) { |route, _| return route }
end

.get_routes(application_routes, request, current_route: nil) ⇒ Object

Show routes under a controller action; used for the browsable API.



65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
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
 
# File 'lib/rest_framework/utils.rb', line 65

def self.get_routes(application_routes, request, current_route: nil)
  current_route ||= self.get_request_route(application_routes, request)
  current_path = current_route.path.spec.to_s.gsub("(.:format)", "")
  current_path = "" if current_path == "/"
  current_levels = current_path.count("/")
  current_comparable_path = %r{^#{Regexp.quote(self.comparable_path(current_path))}(/|$)}

  # Get current route path parameters.
  path_params = current_route.required_parts.map { |n| request.path_parameters[n] }

  # Return routes that match our current route subdomain/pattern, grouped by controller. We
  # precompute certain properties of the route for performance.
  application_routes.routes.select { |r|
    # We `select` first to avoid unnecessarily calculating metadata for routes we don't even want
    # to show.
    (r.defaults[:subdomain].blank? || r.defaults[:subdomain] == request.subdomain) &&
        current_comparable_path.match?(self.comparable_path(r.path.spec.to_s)) &&
        r.defaults[:controller].present? &&
        r.defaults[:action].present?
  }.map { |r|
    path = r.path.spec.to_s.gsub("(.:format)", "")

    # Starts at the number of levels in current path, and removes the `(.:format)` at the end.
    relative_path = path.split("/")[current_levels..]&.join("/").presence || "/"

    # This path is what would need to be concatenated onto the current path to get to the
    # destination path.
    concat_path = relative_path.gsub(/^[^\/]*/, "").presence || "/"

    levels = path.count("/")
    matches_path = current_path == path
    matches_params = r.required_parts.length == current_route.required_parts.length

    {
      route: r,
      verb: r.verb,
      path: path,
      path_with_params: r.format(
        r.required_parts.each_with_index.map { |p, i| [ p, path_params[i] ] }.to_h,
      ),
      relative_path: relative_path,
      concat_path: concat_path,
      controller: r.defaults[:controller].presence,
      action: r.defaults[:action].presence,
      matches_path: matches_path,
      matches_params: matches_params,
      # The following options are only used in subsequent processing in this method.
      _levels: levels,
    }
  }.sort_by { |r|
    [
      # Sort by levels first, so routes matching closely with current request show first.
      r[:_levels],
      # Then match by path, but manually sort ':' to the end using knowledge that Ruby sorts the
      # pipe character '|' after alphanumerics.
      r[:path].tr(":", "|"),
      # Finally, match by HTTP verb.
      HTTP_VERB_ORDERING.index(r[:verb]) || 99,
    ]
  }.group_by { |r| r[:controller] }.sort_by { |c, _r|
    # Sort the controller groups by current controller first, then alphanumerically.
    # Note: Use `controller_path` instead of `params[:controller]` to avoid re-raising a
    # `ActionDispatch::Http::Parameters::ParseError` exception.
    [ request.controller_class.controller_path == c ? 0 : 1, c ]
  }.to_h
end

.get_skipped_builtin_actions(controller_class) ⇒ Object

Get actions which should be skipped for a given controller.



45
46
47
48
49
50
51
 
# File 'lib/rest_framework/utils.rb', line 45

def self.get_skipped_builtin_actions(controller_class)
  (
    RESTFramework::BUILTIN_ACTIONS.keys + RESTFramework::BUILTIN_MEMBER_ACTIONS.keys
  ).reject do |action|
    controller_class.method_defined?(action)
  end
end

.id_field_for(field, reflection) ⇒ Object

Get a field’s id/ids variation.



223
224
225
226
227
228
229
230
231
232
233
 
# File 'lib/rest_framework/utils.rb', line 223

def self.id_field_for(field, reflection)
  if reflection.collection?
    return "#{field.singularize}_ids"
  elsif reflection.belongs_to?
    # The id field for belongs_to is always the foreign key column name, even if the
    # association is named differently.
    return reflection.foreign_key
  end

  nil
end

.inflect(s, acronyms = nil) ⇒ Object

Custom inflector for RESTful controllers.



133
134
135
136
137
138
139
 
# File 'lib/rest_framework/utils.rb', line 133

def self.inflect(s, acronyms = nil)
  acronyms&.each do |acronym|
    s = s.gsub(/\b#{acronym}\b/i, acronym)
  end

  s
end

.parse_extra_actions(extra_actions) ⇒ Object

Convert ‘extra_actions` hash to a consistent format: `methods:, metadata:, kwargs:`.



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
# File 'lib/rest_framework/utils.rb', line 5

def self.parse_extra_actions(extra_actions)
  (extra_actions || {}).map { |k, v|
    path = k
    kwargs = {}

    # Convert structure to path/methods/kwargs.
    if v.is_a?(Hash)
      # Symbolize keys (which also makes a copy so we don't mutate the original).
      v = v.symbolize_keys

      # Cast method/methods to an array.
      methods = [ v.delete(:methods), v.delete(:method) ].flatten.compact

      # Override path if it's provided.
      if v.key?(:path)
        path = v.delete(:path)
      end

      # Extract metadata, if provided.
      metadata = v.delete(:metadata).presence

      # Pass any further kwargs to the underlying Rails interface.
      kwargs = v
    else
      methods = [ v ].flatten
    end

    next [
      k,
      {
        path: path,
        methods: methods,
        metadata: metadata,
        kwargs: kwargs,
      }.compact,
    ]
  }.to_h
end

.parse_fields_hash(h, model, exclude_associations:, action_text:, active_storage:) ⇒ Object

Parse fields hashes.



142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
 
# File 'lib/rest_framework/utils.rb', line 142

def self.parse_fields_hash(h, model, exclude_associations:, action_text:, active_storage:)
  parsed_fields = h[:only] || (
    model ? self.fields_for(
      model,
      exclude_associations: exclude_associations,
      action_text: action_text,
      active_storage: active_storage,
    ) : []
  )
  parsed_fields += h[:include].map(&:to_s) if h[:include]
  parsed_fields -= h[:exclude].map(&:to_s) if h[:exclude]
  parsed_fields -= h[:except].map(&:to_s) if h[:except]

  # Warn for any unknown keys.
  (h.keys - [ :only, :except, :include, :exclude ]).each do |k|
    Rails.logger.warn("RRF: Unknown key in fields hash: #{k}")
  end

  # We should always return strings, not symbols.
  parsed_fields.map(&:to_s)
end

.sub_fields_for(ref) ⇒ Object

Get the sub-fields that may be serialized and filtered/ordered for a reflection.



201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
 
# File 'lib/rest_framework/utils.rb', line 201

def self.sub_fields_for(ref)
  if !ref.polymorphic? && model = ref.klass
    sub_fields = [ model.primary_key ].flatten.compact
    label_fields = RESTFramework.config.label_fields

    # Preferrably find a database column to use as label.
    if match = label_fields.find { |f| f.in?(model.column_names) }
      return sub_fields + [ match ]
    end

    # Otherwise, find a method.
    if match = label_fields.find { |f| model.method_defined?(f) }
      return sub_fields + [ match ]
    end

    return sub_fields
  end

  [ "id", "name" ]
end

.wrap_ams(s) ⇒ Object

Wrap a serializer with an adapter if it is an ActiveModel::Serializer.



236
237
238
239
240
241
242
 
# File 'lib/rest_framework/utils.rb', line 236

def self.wrap_ams(s)
  if defined?(ActiveModel::Serializer) && (s < ActiveModel::Serializer)
    return RESTFramework::ActiveModelSerializerAdapterFactory.for(s)
  end

  s
end