Självstudie: Demonstration av alla användargränssnittswidgetar

I den här självstudien skapar du en Python UDF-operator för Lakeflow Designer som använder varje UI-widget som är tillgänglig i user-defined-operator-v0.1.0 schemat. Använd den som en mall när du skapar egna operatorer. En bredare översikt finns i Användardefinierade operatorer i Lakeflow Designer.

Overview

Den här operatorn är en demonstration av UDF som accepterar parametrar med varje tillgänglig UI-widgettyp. Den sammanfogar alla indatavärden till en beskrivande sträng, vilket gör det enkelt att se hur varje widget skickar data till din funktion.

De tillgängliga widgettyperna är:

Widget Description Datatyp
expression Kolumn-/uttrycksväljare från indataport expression
input Textinmatning med en rad string
textarea Textområde med flera rader string
checkbox Växlingsknapp för kryssruta Boolean
toggle Växlingsknapp Boolean
number Numerisk inmatning med min/max number
slider Numeriskt skjutreglage med intervall number
select Listruta för enkelval (statiska värden) string
select Listruta för enkelval (från indatakolumner) string
multi-select Flera val (statiska värden) string[]
multi-select Flera val (från indatakolumner) string[]

Steg 1: Skriva och testa funktionen Python

Definiera först funktionen Python som accepterar alla olika parametertyper. Den här funktionen sammanfogar helt enkelt alla indata till en beskrivande sträng i demonstrationssyfte.

def concat_all_widgets(
    # expression widget - column value from input
    expr_value: str,
    # input widget - single line text
    text_input: str,
    # textarea widget - multi line text
    text_area: str,
    # checkbox widget - boolean
    checkbox_flag: bool,
    # toggle widget - boolean
    toggle_flag: bool,
    # number widget - numeric input
    number_value: float,
    # slider widget - numeric slider
    slider_value: float,
    # select widget with static options
    select_static: str,
    # select widget with inputColumns options
    select_column: str,
    # multi-select widget with static options (array of strings)
    multi_select_static: list,
    # multi-select widget with inputColumns options (array of strings)
    multi_select_columns: list
) -> str:
    """
    Concatenates all input parameters into a descriptive string.
    This demonstrates all UI widget types available in user-defined operators.
    """
    lines = [
        f"1: Expression (Column Picker) -> {expr_value}",
        f"2: Text Input (Single Line) -> {text_input}",
        f"3: Text Area (Multi-Line) -> {text_area}",
        f"4: Checkbox Option -> {checkbox_flag}",
        f"5: Toggle Switch -> {toggle_flag}",
        f"6: Number Input -> {number_value}",
        f"7: Slider Value -> {slider_value}",
        f"8: Select (Static Options) -> {select_static}",
        f"9: Select (From Input Columns) -> {select_column}",
        f"10: Multi-Select (Static Options) -> [{', '.join(multi_select_static or [])}]",
        f"11: Multi-Select (From Input Columns) -> [{', '.join(multi_select_columns or [])}]"
    ]
    return "\n".join(lines)

Testa funktionen med följande kod:

result = concat_all_widgets(
    expr_value="column_value_123",
    text_input="Hello World",
    text_area="Line 1\nLine 2\nLine 3",
    checkbox_flag=True,
    toggle_flag=False,
    number_value=42.5,
    slider_value=75.0,
    select_static="option_b",
    select_column="amount",
    multi_select_static=["tag1", "tag3"],
    multi_select_columns=["col1", "col3"]
)
print(result)

Steg 2: Skapa YAML-konfigurationen

YAML-konfigurationen definierar hur operatorn visas i Lakeflow Designer. Det här exemplet visar varje tillgänglig widgettyp:

schema: user-defined-operator-v0.1.0
type: uc-udf
name: All Widgets Demo
id: demo.all_widgets
version: '1.0.0'
description: >
  A demonstration UDF that showcases all available UI widgets.
config:
  type: object
  properties:
    # ============================================
    # EXPRESSION WIDGET
    # ============================================
    expr_value:
      type: string
      format: expression
      title: 1. Expression (Column Picker)
      examples:
        - 'Select a column or enter an expression'
      x-ui:
        widget: expression
        port: in

    # ============================================
    # INPUT WIDGET (single-line text)
    # ============================================
    text_input:
      type: string
      title: 2. Text Input (Single Line)
      default: default text
      examples:
        - 'Enter a single line of text'
      x-ui:
        widget: input

    # ============================================
    # TEXTAREA WIDGET (multi-line text)
    # ============================================
    text_area:
      type: string
      title: 3. Text Area (Multi-Line)
      default: Sample text
      examples:
        - 'Enter multiple lines of text here...'
      x-ui:
        widget: textarea
        rows: 3

    # ============================================
    # CHECKBOX WIDGET (boolean)
    # ============================================
    checkbox_flag:
      type: boolean
      title: 4. Checkbox Option
      default: true
      x-ui:
        widget: checkbox

    # ============================================
    # TOGGLE WIDGET (boolean switch)
    # ============================================
    toggle_flag:
      type: boolean
      title: 5. Toggle Switch
      default: false
      x-ui:
        widget: toggle

    # ============================================
    # NUMBER WIDGET (numeric input with min/max)
    # ============================================
    number_value:
      type: number
      title: 6. Number Input
      default: 50
      minimum: 0
      maximum: 100
      examples:
        - 'Enter a number (0-100)'
      x-ui:
        widget: number

    # ============================================
    # SLIDER WIDGET (numeric slider)
    # ============================================
    slider_value:
      type: number
      title: 7. Slider Value
      default: 50
      minimum: 0
      maximum: 100
      x-ui:
        widget: slider
        step: 5

    # ============================================
    # SELECT WIDGET with STATIC options
    # ============================================
    select_static:
      type: string
      title: 8. Select (Static Options)
      default: option_a
      examples:
        - 'Choose an option'
      x-ui:
        widget: select
        optionsSource:
          type: static
          values:
            - option_a
            - option_b
            - option_c

    # ============================================
    # SELECT WIDGET with INPUT COLUMNS options
    # ============================================
    select_column:
      type: string
      title: 9. Select (From Input Columns)
      examples:
        - 'Select a column from input'
      x-ui:
        widget: select
        optionsSource:
          type: inputColumns
          port: in

    # ============================================
    # MULTI-SELECT WIDGET with STATIC options
    # ============================================
    multi_select_static:
      type: array
      items:
        type: string
      title: 10. Multi-Select (Static Options)
      default:
        - tag1
        - tag2
      examples:
        - 'Select one or more tags'
      x-ui:
        widget: multi-select
        optionsSource:
          type: static
          values:
            - tag1
            - tag2
            - tag3
            - tag4
            - tag5

    # ============================================
    # MULTI-SELECT WIDGET with INPUT COLUMNS options
    # ============================================
    multi_select_columns:
      type: array
      items:
        type: string
      title: 11. Multi-Select (From Input Columns)
      examples:
        - 'Select one or more columns'
      x-ui:
        widget: multi-select
        optionsSource:
          type: inputColumns
          port: in

  required:
    - expr_value
  additionalProperties: false
ports:
  input:
    - name: in
      title: Input Data
  output:
    - name: out
      title: Output

Schemaöversikt

Konfigurationsnyckel Widget Datatyp Purpose
expr_value expression expression Välj en kolumn eller ett uttryck från indata.
text_input input string Textpost med en rad.
text_area textarea string Textpost med flera rader.
checkbox_flag checkbox Boolean Boolesk kryssruta.
toggle_flag toggle Boolean Boolesk växlingsknapp.
number_value number number Numeriska indata med min/max-validering.
slider_value slider number Numerisk skjutreglage med stegvisa intervall.
select_static select string Listruta med hårdkodade alternativ.
select_column select string Listrutan fylls i från indatakolumner.
multi_select_static multi-select string[] Flerval med hårdkodade alternativ.
multi_select_columns multi-select string[] Flera val ifyllda från indatakolumner.

Typer av alternativkällor

För select widgetar och multi-select widgetar måste du ange en optionsSource:

Statiska alternativ: Fast lista med värden:

optionsSource:
  type: static
  values:
    - value1
    - value2
    - value3

Indatakolumner: Dynamisk lista från portkolumner för indata:

optionsSource:
  type: inputColumns
  port: in

Se YAML-referensen för användardefinierad operatör för en omfattande guide till alla tillgängliga egenskaper, datatyper, widgetar och alternativ.

Steg 3: Skapa funktionen Unity Catalog

Kombinera YAML-konfigurationen och funktionen Python till en enda CREATE FUNCTION-instruktion. Observera att värden för string[] (multi-select) skickas som ARRAY<STRING> till UDF:en.

CREATE OR REPLACE FUNCTION main.my_schema.all_widgets_demo(
    expr_value STRING,
    text_input STRING,
    text_area STRING,
    checkbox_flag BOOLEAN,
    toggle_flag BOOLEAN,
    number_value DOUBLE,
    slider_value DOUBLE,
    select_static STRING,
    select_column STRING,
    multi_select_static ARRAY<STRING>,
    multi_select_columns ARRAY<STRING>
)
RETURNS STRING
LANGUAGE PYTHON
AS $$
  """
  schema: user-defined-operator-v0.1.0
  type: uc-udf
  name: All Widgets Demo
  id: demo.all_widgets
  version: "1.0.0"
  description: >
    A demonstration UDF that showcases all available UI widgets.
  config:
    type: object
    properties:
      expr_value:
        type: string
        format: expression
        title: 1. Expression (Column Picker)
        examples:
          - "Select a column or enter an expression"
        x-ui:
          widget: expression
          port: in
      text_input:
        type: string
        title: 2. Text Input (Single Line)
        default: "default text"
        examples:
          - "Enter a single line of text"
        x-ui:
          widget: input
      text_area:
        type: string
        title: 3. Text Area (Multi-Line)
        default: Sample text
        examples:
          - "Enter multiple lines of text here..."
        x-ui:
          widget: textarea
          rows: 3
      checkbox_flag:
        type: boolean
        title: 4. Checkbox Option
        default: true
        x-ui:
          widget: checkbox
      toggle_flag:
        type: boolean
        title: 5. Toggle Switch
        default: false
        x-ui:
          widget: toggle
      number_value:
        type: number
        title: 6. Number Input
        default: 50
        minimum: 0
        maximum: 100
        examples:
          - "Enter a number (0-100)"
        x-ui:
          widget: number
      slider_value:
        type: number
        title: 7. Slider Value
        default: 50
        minimum: 0
        maximum: 100
        x-ui:
          widget: slider
          step: 5
      select_static:
        type: string
        title: 8. Select (Static Options)
        default: option_a
        examples:
          - "Choose an option"
        x-ui:
          widget: select
          optionsSource:
            type: static
            values:
              - option_a
              - option_b
              - option_c
      select_column:
        type: string
        title: 9. Select (From Input Columns)
        examples:
          - "Select a column from input"
        x-ui:
          widget: select
          optionsSource:
            type: inputColumns
            port: in
      multi_select_static:
        type: array
        items:
          type: string
        title: 10. Multi-Select (Static Options)
        default:
          - tag1
          - tag2
        examples:
          - "Select one or more tags"
        x-ui:
          widget: multi-select
          optionsSource:
            type: static
            values:
              - tag1
              - tag2
              - tag3
              - tag4
              - tag5
      multi_select_columns:
        type: array
        items:
          type: string
        title: 11. Multi-Select (From Input Columns)
        examples:
          - "Select one or more columns"
        x-ui:
          widget: multi-select
          optionsSource:
            type: inputColumns
            port: in
    required:
      - expr_value
    additionalProperties: false
  ports:
    input:
      - name: in
        title: Input Data
    output:
      - name: out
        title: Output
  """

  def concat_all_widgets(
      expr_value: str,
      text_input: str,
      text_area: str,
      checkbox_flag: bool,
      toggle_flag: bool,
      number_value: float,
      slider_value: float,
      select_static: str,
      select_column: str,
      multi_select_static: list,
      multi_select_columns: list
  ) -> str:
      lines = [
          f"1: Expression (Column Picker) -> {expr_value}",
          f"2: Text Input (Single Line) -> {text_input}",
          f"3: Text Area (Multi-Line) -> {text_area}",
          f"4: Checkbox Option -> {checkbox_flag}",
          f"5: Toggle Switch -> {toggle_flag}",
          f"6: Number Input -> {number_value}",
          f"7: Slider Value -> {slider_value}",
          f"8: Select (Static Options) -> {select_static}",
          f"9: Select (From Input Columns) -> {select_column}",
          f"10: Multi-Select (Static Options) -> [{', '.join(multi_select_static or [])}]",
          f"11: Multi-Select (From Input Columns) -> [{', '.join(multi_select_columns or [])}]"
      ]
      return "\n".join(lines)

  return concat_all_widgets(
      expr_value,
      text_input,
      text_area,
      checkbox_flag,
      toggle_flag,
      number_value,
      slider_value,
      select_static,
      select_column,
      multi_select_static,
      multi_select_columns
  )
$$

Steg 4: Testa funktionen

Testa UC-funktionen direkt med SQL:

SELECT main.my_schema.all_widgets_demo(
    'my_column_value',             -- expr_value (expression)
    'Hello World',                 -- text_input (input)
    'Multi\nLine\nText',           -- text_area (textarea)
    TRUE,                          -- checkbox_flag (checkbox)
    FALSE,                         -- toggle_flag (toggle)
    42.5,                          -- number_value (number)
    75.0,                          -- slider_value (slider)
    'option_b',                    -- select_static (select with static)
    'amount',                      -- select_column (select with inputColumns)
    array('tag1', 'tag3'),         -- multi_select_static (multi-select with static)
    array('col1', 'col2', 'col3')  -- multi_select_columns (multi-select with inputColumns)
) AS result;

Steg 5: Registrera operatorn

Lägg till operatorn i din .user_defined_operators.yaml-fil:

operators:
  - catalog: main
    schema: my_schema
    functionName: all_widgets_demo

Steg 6: Konfigurera behörigheter

Bevilja åtkomst till användare som behöver använda den här operatorn:

GRANT USE SCHEMA ON SCHEMA main.my_schema TO `<user>`;
GRANT EXECUTE ON FUNCTION main.my_schema.all_widgets_demo TO `<user>`;

Använda operatorn i Lakeflow Designer

När den har registrerats visas operatorn i Lakeflow Designer med ett omfattande konfigurationsfönster med:

  • En uttrycksväljare för kolumnmarkering
  • Textinmatningar (enkelrads- och flerradsformat)
  • Booleska kontroller (kryssruta och växlingsknapp)
  • Numeriska indata (talfält och skjutreglage)
  • Rullgardinslistor med både statiska och dynamiska alternativ
  • Flervalskontroller för att välja flera värden

Den här operatorn fungerar som en användbar referens för att förstå hur varje widgettyp renderar och skickar data till din funktion.

Information om varje widgets datatyp och alternativ finns i UI-widgetar.

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