class GraphQL::Relay::RangeAdd
This provides some isolation from `GraphQL::Relay` internals.
Given a list of items and a new item, it will provide a connection and an edge.
The connection doesn't receive outside arguments, so the list of items should be ordered and paginated before providing it here.
@example Adding a comment to list of comments
post = Post.find(args[:post_id]) comments = post.comments new_comment = comments.build(body: args[:body]) new_comment.save! range_add = GraphQL::Relay::RangeAdd.new( parent: post, collection: comments, item: new_comment, context: context, ) response = { post: post, comments_connection: range_add.connection, new_comment_edge: range_add.edge, }
Attributes
Public Class Methods
@param collection [Object] The list of items to wrap in a connection @param item [Object] The newly-added item (will be wrapped in `edge_class`) @param parent [Object] The owner of `collection`, will be passed to the connection if provided @param context [GraphQL::Query::Context] The surrounding `ctx`, will be passed to the connection if provided (this is required for cursor encoders) @param edge_class [Class] The class to wrap `item` with (defaults to the connection's edge class)
# File lib/graphql/relay/range_add.rb, line 37 def initialize(collection:, item:, parent: nil, context: nil, edge_class: nil) if context.nil? caller_loc = caller(2, 1).first GraphQL::Deprecation.warn("`context: ...` will be required by `RangeAdd.new` in GraphQL-Ruby 2.0. Add `context: context` to the call at #{caller_loc}.") end if context && context.schema.new_connections? conn_class = context.schema.connections.wrapper_for(collection) # The rest will be added by ConnectionExtension @connection = conn_class.new(collection, parent: parent, context: context, edge_class: edge_class) # Check if this connection supports it, to support old versions of GraphQL-Pro @edge = if @connection.respond_to?(:range_add_edge) @connection.range_add_edge(item) else @connection.edge_class.new(item, @connection) end else connection_class = BaseConnection.connection_for_nodes(collection) @connection = connection_class.new(collection, {}, parent: parent, context: context) edge_class ||= Relay::Edge @edge = edge_class.new(item, @connection) end @parent = parent end