🔧 refactor(base.py): add source_handle, target_handle, and target_param attributes to Edge class

The Edge class constructor now takes an additional parameter 'edge' which is a dictionary containing additional information about the edge. This information is used to set the source_handle, target_handle, and target_param attributes of the Edge class. This change allows for more flexibility and extensibility when working with edges in the graph.
🔧 refactor(base.py): add edge parameter to Edge class constructor to pass additional edge information

src/backend/langflow/graph/edge/base.py

@@ -6,9 +6,15 @@ if TYPE_CHECKING:
 
 
 class Edge:
-    def __init__(self, source: "Vertex", target: "Vertex"):
+    def __init__(self, source: "Vertex", target: "Vertex", edge: dict):
         self.source: "Vertex" = source
         self.target: "Vertex" = target
+        self.source_handle = edge.get("sourceHandle", "")
+        self.target_handle = edge.get("targetHandle", "")
+        # 'BaseLoader;BaseOutputParser|documents|PromptTemplate-zmTlD'
+        # target_param is documents
+        self.target_param = self.target_handle.split("|")[1]
+
         self.validate_edge()
 
     def validate_edge(self) -> None:

src/backend/langflow/graph/graph/base.py

@@ -179,7 +179,7 @@ class Graph:
                 raise ValueError(f"Source node {edge['source']} not found")
             if target is None:
                 raise ValueError(f"Target node {edge['target']} not found")
-            edges.append(Edge(source, target))
+            edges.append(Edge(source, target, edge))
         return edges
 
     def _get_vertex_class(self, node_type: str, node_lc_type: str) -> Type[Vertex]: