Module: GraphQL::Schema::Member::BuildType Private

Defined in:
lib/graphql/schema/member/build_type.rb

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

Constant Summary collapse

LIST_TYPE_ERROR =

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

"Use an array of [T] or [T, null: true] for list types; other arrays are not supported"

Class Method Summary collapse

Class Method Details

.camelize(string) ⇒ Object

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. 



122
123
124
125
126
127
128
129
130
131
 
# File 'lib/graphql/schema/member/build_type.rb', line 122

def camelize(string)
  return string if string == '_'
  return string unless string.include?("_")
  camelized = string.split('_').map(&:capitalize).join
  camelized[0] = camelized[0].downcase
  if (match_data = string.match(/\A(_+)/))
    camelized = "#{match_data[0]}#{camelized}"
  end
  camelized
end

.constantize(string) ⇒ Object

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.

Resolves constant from string (based on Rails ActiveSupport::Inflector.constantize)



134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
 
# File 'lib/graphql/schema/member/build_type.rb', line 134

def constantize(string)
  names = string.split('::')

  # Trigger a built-in NameError exception including the ill-formed constant in the message.
  Object.const_get(string) if names.empty?

  # Remove the first blank element in case of '::ClassName' notation.
  names.shift if names.size > 1 && names.first.empty?

  names.inject(Object) do |constant, name|
    if constant == Object
      constant.const_get(name)
    else
      candidate = constant.const_get(name)
      next candidate if constant.const_defined?(name, false)
      next candidate unless Object.const_defined?(name)

      # Go down the ancestors to check if it is owned directly. The check
      # stops when we reach Object or the end of ancestors tree.
      constant = constant.ancestors.inject do |const, ancestor|
        break const    if ancestor == Object
        break ancestor if ancestor.const_defined?(name, false)
        const
      end

      # Owner is in Object, so raise.
      constant.const_get(name, false)
    end
  end
end

.parse_type(type_expr, null:) ⇒ GraphQL::BaseType

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.

Parameters:

Returns:



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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
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
 
# File 'lib/graphql/schema/member/build_type.rb', line 12

def parse_type(type_expr, null:)
  list_type = false

  return_type = case type_expr
  when String
    case type_expr
    when "String"
      GraphQL::Types::String
    when "Int", "Integer"
      GraphQL::Types::Int
    when "Float"
      GraphQL::Types::Float
    when "Boolean"
      GraphQL::Types::Boolean
    when "ID"
      GraphQL::Types::ID
    when /\A\[.*\]\Z/
      list_type = true
      # List members are required by default
      parse_type(type_expr[1..-2], null: false)
    when /.*!\Z/
      null = false
      parse_type(type_expr[0..-2], null: true)
    else
      maybe_type = constantize(type_expr)
      case maybe_type
      when GraphQL::BaseType
        maybe_type
      when Module
        # This is a way to check that it's the right kind of module:
        if maybe_type.respond_to?(:graphql_definition)
          maybe_type
        else
          raise ArgumentError, "Unexpected class/module found for GraphQL type: #{type_expr} (must be type definition class/module)"
        end
      end
    end
  when GraphQL::BaseType, GraphQL::Schema::LateBoundType
    type_expr
  when Array
    case type_expr.length
    when 1
      list_type = true
      # List members are required by default
      parse_type(type_expr.first, null: false)
    when 2
      inner_type, nullable_option = type_expr
      if nullable_option.keys != [:null] || (nullable_option[:null] != true && nullable_option[:null] != false)
        raise ArgumentError, LIST_TYPE_ERROR
      end
      list_type = true
      parse_type(inner_type, null: nullable_option[:null])
    else
      raise ArgumentError, LIST_TYPE_ERROR
    end
  when GraphQL::Schema::NonNull, GraphQL::Schema::List
    type_expr
  when Module
    # This is a way to check that it's the right kind of module:
    if type_expr.respond_to?(:graphql_definition)
      type_expr
    else
      # Eg `String` => GraphQL::Types::String
      parse_type(type_expr.name, null: true)
    end
  when Proc
    parse_type(type_expr.call, null: true)
  when false
    raise ArgumentError, "Received `false` instead of a type, maybe a `!` should be replaced with `null: true` (for fields) or `required: true` (for arguments)"
  end

  if return_type.nil?
    raise "Unexpected type input: #{type_expr.inspect} (#{type_expr.class})"
  end

  # Apply list_type first, that way the
  # .to_non_null_type applies to the list type, not the inner type
  if list_type
    return_type = return_type.to_list_type
  end

  if !null
    return_type = return_type.to_non_null_type
  end


  return_type
end

.to_type_name(something) ⇒ Object

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. 



101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
 
# File 'lib/graphql/schema/member/build_type.rb', line 101

def to_type_name(something)
  case something
  when GraphQL::BaseType, GraphQL::Schema::LateBoundType
    something.unwrap.name
  when Array
    to_type_name(something.first)
  when Module
    if something.respond_to?(:graphql_name)
      something.graphql_name
    else
      to_type_name(something.name)
    end
  when String
    something.gsub(/\]\[\!/, "").split("::").last
  when GraphQL::Schema::NonNull, GraphQL::Schema::List
    to_type_name(something.unwrap)
  else
    raise "Unhandled to_type_name input: #{something} (#{something.class})"
  end
end

.underscore(string) ⇒ Object

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. 



165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'lib/graphql/schema/member/build_type.rb', line 165

def underscore(string)
  if string.match?(/\A[a-z_]+\Z/)
    return string
  end
  string2 = string.dup

  string2.gsub!(/([A-Z]+)([A-Z][a-z])/,'\1_\2') # URLDecoder -> URL_Decoder
  string2.gsub!(/([a-z\d])([A-Z])/,'\1_\2')     # someThing -> some_Thing
  string2.downcase!

  string2
end