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# frozen_string_literal: true
module GraphQL
module Relay
# 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[:postId])
# 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: ctx,
# )
#
# response = {
# post: post,
# commentsConnection: range_add.connection,
# newCommentEdge: range_add.edge,
# }
class RangeAdd
attr_reader :edge, :connection, :parent
# @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
def initialize(collection:, item:, parent: nil, context: nil, edge_class: Relay::Edge)
connection_class = BaseConnection.connection_for_nodes(collection)
@parent = parent
@connection = connection_class.new(collection, {}, parent: parent, context: context)
@edge = edge_class.new(item, @connection)
end
end
end
end
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119 entries across 119 versions & 1 rubygems