fix bugs about multi input for generate (#1525)

### What problem does this PR solve?



### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

graph/canvas.py

@@ -193,9 +193,13 @@ class Canvas(ABC):
                     self.answer.append(c)
                 else:
                     if DEBUG: print("RUN: ", c)
+                    if cpn.component_name == "Generate":
+                        cpids = cpn.get_dependent_components()
+                        if any([c not in self.path[-1] for c in cpids]):
+                            continue
                     ans = cpn.run(self.history, **kwargs)
                     self.path[-1].append(c)
-                ran += 1
+            ran += 1
 
         prepare2run(self.components[self.path[-2][-1]]["downstream"])
         while 0 <= ran < len(self.path[-1]):

graph/component/base.py

@@ -445,6 +445,7 @@ class ComponentBase(ABC):
         if DEBUG: print(self.component_name, reversed_cpnts[::-1])
         for u in reversed_cpnts[::-1]:
             if self.get_component_name(u) in ["switch"]: continue
+            if u not in self._canvas.get_component(self._id)["upstream"]: continue
             if self.component_name.lower().find("switch") < 0 \
                     and self.get_component_name(u) in ["relevant", "categorize"]:
                 continue

graph/component/generate.py

@@ -63,6 +63,10 @@ class GenerateParam(ComponentParamBase):
 class Generate(ComponentBase):
     component_name = "Generate"
 
+    def get_dependent_components(self):
+        cpnts = [para["component_id"] for para in self._param.parameters]
+        return cpnts
+
     def _run(self, history, **kwargs):
         chat_mdl = LLMBundle(self._canvas.get_tenant_id(), LLMType.CHAT, self._param.llm_id)
         prompt = self._param.prompt