Merge pull request #207 from neo4jrb/fix_set_array_values

Don't convert arrays to the first element in `key_value_string` if it is a `set`

lib/neo4j-core/query_clauses.rb

@@ -143,15 +143,15 @@ def to_cypher(clauses)
 
         private
 
-        def key_value_string(key, value, previous_keys = [], force_equals = false)
+        def key_value_string(key, value, previous_keys = [], is_set = false)
           param = (previous_keys << key).join(UNDERSCORE)
           param.tr_s!('^a-zA-Z0-9', UNDERSCORE)
           param.gsub!(/^_+|_+$/, '')
 
-          value = value.first if value.is_a?(Array) && value.size == 1
+          value = value.first if !is_set && value.is_a?(Array) && value.size == 1
           @params[param.to_sym] = value
 
-          if !value.is_a?(Array) || force_equals
+          if !value.is_a?(Array) || is_set
             "#{key} = {#{param}}"
           else
             "#{key} IN {#{param}}"

lib/neo4j-server/cypher_node.rb

@@ -31,7 +31,7 @@ def _java_node
       # (see Neo4j::Node#create_rel)
       def create_rel(type, other_node, props = nil)
         q = @session.query.match(:a, :b).where(a: {neo_id: neo_id}, b: {neo_id: other_node.neo_id})
-            .create("(a)-[r:`#{type}`]->(b)").break.set_props(r: props).return(r: :neo_id)
+            .create("(a)-[r:`#{type}`]->(b)").break.set(r: props).return(r: :neo_id)
 
         id = @session._query_or_fail(q, true)