#' Retrieve Relationships with Cypher Queries
#'
#' Deprecated. Use \code{\link{cypherToList}}. Retrieve relationships from the graph with a Cypher query.
#'
#' @param graph A graph object.
#' @param query A character string.
#' @param ... Parameters to pass to the query in the form key = value, if applicable.
#'
#' @return A list of relationship objects.
#'
#' @examples
#' \dontrun{
#' graph = startGraph("http://localhost:7474/db/data/")
#' clear(graph)
#'
#' alice = createNode(graph, "Person", name = "Alice")
#' bob = createNode(graph, "Person", name = "Bob")
#' charles = createNode(graph, "Person", name = "Charles")
#' david = createNode(graph, "Person", name = "David")
#'
#' createRel(alice, "KNOWS", bob)
#' createRel(alice, "KNOWS", charles)
#' createRel(charles, "KNOWS", david)
#'
#' createRel(bob, "WORKS_WITH", david)
#' createRel(alice, "WORKS_WITH", david)
#'
#' getRels(graph, "MATCH (:Person)-[k:KNOWS]->(:Person) RETURN k")
#' getRels(graph, "MATCH (:Person {name:{name}})-[r]->(:Person) RETURN r", name = "Alice")
#' }
#'
#' @seealso \code{\link{getSingleRel}}
#'
#' @export
getRels = function(graph, query, ...) UseMethod("getRels")
#' @export
getRels.graph = function(graph, query, ...) {
result = cypherToList(graph, query, ...)
if(length(result) == 0) {
return(invisible())
}
for(i in 1:length(result)) {
result[[i]] = result[[i]][[1]]
}
return(result)
}
#' @export
getRels.boltGraph = getRels.graph;
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