feat(ui): add errors for invalid polymorphic types

invokeai/frontend/web/public/locales/en.json

@@ -971,6 +971,8 @@
         "outputFieldTypeParseError": "Unable to parse type of output field {{node}}.{{field}} ({{message}})",
         "unableToExtractSchemaNameFromRef": "unable to extract schema name from ref",
         "unsupportedArrayItemType": "unsupported array item type \"{{type}}\"",
+        "unsupportedAnyOfLength": "too many union members ({{count}})",
+        "unsupportedMismatchedUnion": "mismatched polymorphic type with members {{firstType}} and {{secondType}}",
         "unableToParseFieldType": "unable to parse field type",
         "uNetField": "UNet",
         "uNetFieldDescription": "UNet submodel.",
@@ -1353,15 +1355,11 @@
         },
         "compositingBlur": {
             "heading": "Blur",
-            "paragraphs": [
-                "The blur radius of the mask."
-            ]
+            "paragraphs": ["The blur radius of the mask."]
         },
         "compositingBlurMethod": {
             "heading": "Blur Method",
-            "paragraphs": [
-                "The method of blur applied to the masked area."
-            ]
+            "paragraphs": ["The method of blur applied to the masked area."]
         },
         "compositingCoherencePass": {
             "heading": "Coherence Pass",
@@ -1371,9 +1369,7 @@
         },
         "compositingCoherenceMode": {
             "heading": "Mode",
-            "paragraphs": [
-                "The mode of the Coherence Pass."
-            ]
+            "paragraphs": ["The mode of the Coherence Pass."]
         },
         "compositingCoherenceSteps": {
             "heading": "Steps",
@@ -1391,9 +1387,7 @@
         },
         "compositingMaskAdjustments": {
             "heading": "Mask Adjustments",
-            "paragraphs": [
-                "Adjust the mask."
-            ]
+            "paragraphs": ["Adjust the mask."]
         },
         "controlNetBeginEnd": {
             "heading": "Begin / End Step Percentage",
@@ -1451,9 +1445,7 @@
         },
         "infillMethod": {
             "heading": "Infill Method",
-            "paragraphs": [
-                "Method to infill the selected area."
-            ]
+            "paragraphs": ["Method to infill the selected area."]
         },
         "lora": {
             "heading": "LoRA Weight",

invokeai/frontend/web/src/features/nodes/util/parseFieldType.ts

@@ -115,6 +115,15 @@ export const parseFieldType = (
          * Any other cases we ignore.
          */
 
+        if (filteredAnyOf.length !== 2) {
+          // This is a union of more than 2 types, which we don't support
+          throw new UnsupportedFieldTypeError(
+            t('nodes.unsupportedAnyOfLength', {
+              count: filteredAnyOf.length,
+            })
+          );
+        }
+
         let firstType: string | undefined;
         let secondType: string | undefined;
 
@@ -154,6 +163,13 @@ export const parseFieldType = (
             isPolymorphic: true, // <-- don't forget, polymorphic!
           };
         }
+
+        throw new UnsupportedFieldTypeError(
+          t('nodes.unsupportedMismatchedUnion', {
+            firstType,
+            secondType,
+          })
+        );
       }
     } else if (schemaObject.enum) {
       return { name: 'EnumField', isCollection: false, isPolymorphic: false };