Module: GraphQL::Types::Relay::ConnectionBehaviors::ClassMethods

Defined in:
lib/graphql/types/relay/connection_behaviors.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#edge_classClass

Returns:

  • (Class)


44
45
46
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 44

def edge_class
  @edge_class
end

#edge_type(edge_type_class, edge_class: GraphQL::Pagination::Connection::Edge, node_type: edge_type_class.node_type, nodes_field: self.has_nodes_field, node_nullable: self.node_nullable, edges_nullable: self.edges_nullable, edge_nullable: self.edge_nullable, field_options: nil) ⇒ Object

Configure this connection to return edges and nodes based on edge_type_class.

This method will use the inputs to create: - edges field - nodes field - description

It’s called when you subclass this base connection, trying to use the class name to set defaults. You can call it again in the class definition to override the default (or provide a value, if the default lookup failed).

Parameters:

  • field_options (Hash) (defaults to: nil)

    Any extra keyword arguments to pass to the field :edges, ... and field :nodes, ... configurations



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
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 57

def edge_type(edge_type_class, edge_class: GraphQL::Pagination::Connection::Edge, node_type: edge_type_class.node_type, nodes_field: self.has_nodes_field, node_nullable: self.node_nullable, edges_nullable: self.edges_nullable, edge_nullable: self.edge_nullable, field_options: nil)
  # Set this connection's graphql name
  node_type_name = node_type.graphql_name

  @node_type = node_type
  @edge_type = edge_type_class
  @edge_class = edge_class

  base_field_options = {
    name: :edges,
    type: [edge_type_class, null: edge_nullable],
    null: edges_nullable,
    description: "A list of edges.",
    connection: false,
    # Assume that the connection was scoped before this step:
    scope: false,
  }

  if field_options
    base_field_options.merge!(field_options)
  end

  field(**base_field_options)

  define_nodes_field(node_nullable, field_options: field_options) if nodes_field

  description("The connection type for #{node_type_name}.")
end

#node_typeClass

Returns:

  • (Class)


41
42
43
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 41

def node_type
  @node_type
end

Instance Method Details

#authorized?(obj, ctx) ⇒ Boolean

Returns:



96
97
98
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 96

def authorized?(obj, ctx)
  true # Let nodes be filtered out
end

#default_relay?Boolean

Returns:



36
37
38
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 36

def default_relay?
  true
end

#edge_nullable(new_value = nil) ⇒ Object

Set the default edge_nullable for this class and its child classes. (Defaults to true.) Use edge_nullable(false) in your base class to make non-null edge fields.



127
128
129
130
131
132
133
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 127

def edge_nullable(new_value = nil)
  if new_value.nil?
    defined?(@edge_nullable) ? @edge_nullable : superclass.edge_nullable
  else
    @edge_nullable = new_value
  end
end

#edges_nullable(new_value = nil) ⇒ Object

Set the default edges_nullable for this class and its child classes. (Defaults to true.) Use edges_nullable(false) in your base class to make non-null edges fields.



117
118
119
120
121
122
123
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 117

def edges_nullable(new_value = nil)
  if new_value.nil?
    defined?(@edges_nullable) ? @edges_nullable : superclass.edges_nullable
  else
    @edges_nullable = new_value
  end
end

#has_nodes_field(new_value = nil) ⇒ Object

Set the default nodes_field for this class and its child classes. (Defaults to true.) Use nodes_field(false) in your base class to prevent adding of a nodes field.



137
138
139
140
141
142
143
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 137

def has_nodes_field(new_value = nil)
  if new_value.nil?
    defined?(@nodes_field) ? @nodes_field : superclass.has_nodes_field
  else
    @nodes_field = new_value
  end
end

#inherited(child_class) ⇒ Object



25
26
27
28
29
30
31
32
33
34
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 25

def inherited(child_class)
  super
  child_class.has_nodes_field(has_nodes_field)
  child_class.node_nullable(node_nullable)
  child_class.edges_nullable(edges_nullable)
  child_class.edge_nullable(edge_nullable)
  child_class.edge_type = nil
  child_class.node_type = nil
  child_class.edge_class = nil
end

#node_nullable(new_value = nil) ⇒ Object

Set the default node_nullable for this class and its child classes. (Defaults to true.) Use node_nullable(false) in your base class to make non-null node and nodes fields.



107
108
109
110
111
112
113
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 107

def node_nullable(new_value = nil)
  if new_value.nil?
    defined?(@node_nullable) ? @node_nullable : superclass.node_nullable
  else
    @node_nullable = new_value
  end
end

#nodes_field(node_nullable: self.node_nullable, field_options: nil) ⇒ Object

Add the shortcut nodes field to this connection and its subclasses



92
93
94
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 92

def nodes_field(node_nullable: self.node_nullable, field_options: nil)
  define_nodes_field(node_nullable, field_options: field_options)
end

#scope_items(items, context) ⇒ Object

Filter this list according to the way its node type would scope them



87
88
89
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 87

def scope_items(items, context)
  node_type.scope_items(items, context)
end

#visible?(ctx) ⇒ Boolean

Returns:



100
101
102
103
# File 'lib/graphql/types/relay/connection_behaviors.rb', line 100

def visible?(ctx)
  # if this is an abstract base class, there may be no `node_type`
  node_type ? node_type.visible?(ctx) : super
end