feat：不允许可重复添加同一field的表单项 (#2923)

Author: makeitease

src/components/Form/src/hooks/useFormEvents.ts

@@ -210,7 +210,13 @@ export function useFormEvents({
     first = false,
   ) {
     const schemaList: FormSchema[] = cloneDeep(unref(getSchema));
-
+    const addSchemaIds: string[] = Array.isArray(schema)
+      ? schema.map((item) => item.field)
+      : [schema.field];
+    if (schemaList.find((item) => addSchemaIds.includes(item.field))) {
+      error('There are schemas that have already been added');
+      return;
+    }
     const index = schemaList.findIndex((schema) => schema.field === prefixField);
     const _schemaList = isObject(schema) ? [schema as FormSchema] : (schema as FormSchema[]);
     if (!prefixField || index === -1 || first) {