jscheffl commented on code in PR #44942:
URL: https://github.com/apache/airflow/pull/44942#discussion_r1885759686


##########
airflow/ui/src/pages/Variables/AddVariableForm.tsx:
##########
@@ -0,0 +1,119 @@
+/*!
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { Box, HStack, Input, Spacer, Text } from "@chakra-ui/react";
+import { useEffect, useMemo } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { FiSave } from "react-icons/fi";
+
+import { ErrorAlert } from "src/components/ErrorAlert";
+import { Button } from "src/components/ui";
+import { useAddVariable } from "src/queries/useAddVariable";
+
+export type AddVariableBody = {
+  description: string | undefined;
+  key: string;
+  value: string;
+};
+
+type AddVariableFormProps = {
+  onClose: () => void;
+};
+
+const AddVariableForm: React.FC<AddVariableFormProps> = ({ onClose }) => {
+  const { addVariable, error, isPending } = useAddVariable(onClose);
+  const addVariableParams: AddVariableBody = useMemo(
+    () => ({
+      description: undefined,
+      key: "",
+      value: "",
+    }),
+    [],
+  );
+
+  const {
+    control,
+    formState: { isDirty },
+    handleSubmit,
+    reset,
+    watch,
+  } = useForm<AddVariableBody>({
+    defaultValues: addVariableParams,
+  });
+
+  const { key, value } = watch();
+
+  useEffect(() => {
+    reset(addVariableParams);
+  }, [addVariableParams, reset]);
+
+  const onSubmit = (data: AddVariableBody) => {
+    addVariable(data);
+  };
+
+  return (
+    <>
+      <ErrorAlert error={error} />
+      <Text fontSize="md" mb={2} mt={4}>
+        Key <span style={{ color: "red" }}>*</span>
+      </Text>
+      <Controller
+        control={control}
+        name="key"
+        render={({ field }) => <Input {...field} required size="sm" />}
+      />
+
+      <Text fontSize="md" mb={2} mt={4}>
+        Value <span style={{ color: "red" }}>*</span>
+      </Text>
+      <Controller
+        control={control}
+        name="value"
+        render={({ field }) => <Input {...field} required size="sm" />}
+      />
+
+      <Text fontSize="md" mb={2} mt={4}>
+        Description
+      </Text>
+      <Controller
+        control={control}
+        name="description"
+        render={({ field }) => <Input {...field} required size="sm" />}

Review Comment:
   Descriptions should not be required... which by surprise it is not ad point 
of display. It is accepted if I leave it empty.
   ```suggestion
           render={({ field }) => <Input {...field} size="sm" />}
   ```



##########
airflow/ui/src/queries/useAddVariable.ts:
##########
@@ -0,0 +1,67 @@
+/*!
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { useQueryClient } from "@tanstack/react-query";
+import { useState } from "react";
+
+import {
+  useVariableServiceGetVariablesKey,
+  useVariableServicePostVariable,
+} from "openapi/queries";
+import { toaster } from "src/components/ui";
+import type { AddVariableBody } from "src/pages/Variables/AddVariableForm";
+
+export const useAddVariable = (onClose: () => void) => {
+  const queryClient = useQueryClient();
+  const [error, setError] = useState<unknown>(undefined);
+
+  const onSuccess = async () => {
+    await queryClient.invalidateQueries({
+      queryKey: [useVariableServiceGetVariablesKey],
+    });
+
+    toaster.create({
+      description: "Variable has been added successfully",
+      title: "Variable Add Request Submitted",
+      type: "success",
+    });
+
+    onClose();
+  };
+
+  const onError = (_error: unknown) => {
+    setError(_error);
+  };
+
+  const { isPending, mutate } = useVariableServicePostVariable({
+    onError,
+    onSuccess,
+  });
+
+  const addVariable = (addVariableRequestBody: AddVariableBody) => {
+    mutate({

Review Comment:
   If I add a variable which is already existing it is silently overwritten w/o 
showing an error. Can you please change the behavior such that adding is not 
silently overwriting an existing? Showing an error like the legacy might be a 
good option.



##########
airflow/ui/src/pages/Variables/AddVariableForm.tsx:
##########
@@ -0,0 +1,119 @@
+/*!
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { Box, HStack, Input, Spacer, Text } from "@chakra-ui/react";
+import { useEffect, useMemo } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { FiSave } from "react-icons/fi";
+
+import { ErrorAlert } from "src/components/ErrorAlert";
+import { Button } from "src/components/ui";
+import { useAddVariable } from "src/queries/useAddVariable";
+
+export type AddVariableBody = {
+  description: string | undefined;
+  key: string;
+  value: string;
+};
+
+type AddVariableFormProps = {
+  onClose: () => void;
+};
+
+const AddVariableForm: React.FC<AddVariableFormProps> = ({ onClose }) => {
+  const { addVariable, error, isPending } = useAddVariable(onClose);
+  const addVariableParams: AddVariableBody = useMemo(
+    () => ({
+      description: undefined,
+      key: "",
+      value: "",
+    }),
+    [],
+  );
+
+  const {
+    control,
+    formState: { isDirty },
+    handleSubmit,
+    reset,
+    watch,
+  } = useForm<AddVariableBody>({
+    defaultValues: addVariableParams,
+  });
+
+  const { key, value } = watch();
+
+  useEffect(() => {
+    reset(addVariableParams);
+  }, [addVariableParams, reset]);
+
+  const onSubmit = (data: AddVariableBody) => {
+    addVariable(data);
+  };
+
+  return (
+    <>
+      <ErrorAlert error={error} />
+      <Text fontSize="md" mb={2} mt={4}>
+        Key <span style={{ color: "red" }}>*</span>
+      </Text>
+      <Controller
+        control={control}
+        name="key"
+        render={({ field }) => <Input {...field} required size="sm" />}

Review Comment:
   The DB schema is limiting the volume, if I add data longer than the DB can 
hold, an internal server error is raised.
   
   
![image](https://github.com/user-attachments/assets/31ee9314-563a-4e07-8b28-a0613df76a67)
   
   Can you limit the entry boxes to the DB limits?
   And is there abetter error handling in FastAPI needed (==such that not 
internal server error is returned, better in a different PR) or is it not 
correctly handled in the form?



##########
airflow/ui/src/pages/Variables/AddVariableForm.tsx:
##########
@@ -0,0 +1,119 @@
+/*!
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { Box, HStack, Input, Spacer, Text } from "@chakra-ui/react";
+import { useEffect, useMemo } from "react";
+import { Controller, useForm } from "react-hook-form";
+import { FiSave } from "react-icons/fi";
+
+import { ErrorAlert } from "src/components/ErrorAlert";
+import { Button } from "src/components/ui";
+import { useAddVariable } from "src/queries/useAddVariable";
+
+export type AddVariableBody = {
+  description: string | undefined;
+  key: string;
+  value: string;
+};
+
+type AddVariableFormProps = {
+  onClose: () => void;
+};
+
+const AddVariableForm: React.FC<AddVariableFormProps> = ({ onClose }) => {
+  const { addVariable, error, isPending } = useAddVariable(onClose);
+  const addVariableParams: AddVariableBody = useMemo(
+    () => ({
+      description: undefined,
+      key: "",
+      value: "",
+    }),
+    [],
+  );
+
+  const {
+    control,
+    formState: { isDirty },
+    handleSubmit,
+    reset,
+    watch,
+  } = useForm<AddVariableBody>({
+    defaultValues: addVariableParams,
+  });
+
+  const { key, value } = watch();
+
+  useEffect(() => {
+    reset(addVariableParams);
+  }, [addVariableParams, reset]);
+
+  const onSubmit = (data: AddVariableBody) => {
+    addVariable(data);
+  };
+
+  return (
+    <>
+      <ErrorAlert error={error} />
+      <Text fontSize="md" mb={2} mt={4}>
+        Key <span style={{ color: "red" }}>*</span>
+      </Text>
+      <Controller
+        control={control}
+        name="key"
+        render={({ field }) => <Input {...field} required size="sm" />}
+      />
+
+      <Text fontSize="md" mb={2} mt={4}>
+        Value <span style={{ color: "red" }}>*</span>
+      </Text>
+      <Controller
+        control={control}
+        name="value"
+        render={({ field }) => <Input {...field} required size="sm" />}

Review Comment:
   In the legacy UI buth value and description are multi-line fields. Can you 
adjust this?



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