DataLinks: allow using values from other fields in the same row (#21478)

packages/grafana-data/src/field/fieldOverrides.ts

@@ -11,6 +11,7 @@ import {
   ThresholdsMode,
   FieldColorMode,
   ColorScheme,
+  TimeZone,
 } from '../types';
 import { fieldMatchers, ReducerID, reduceField } from '../transformations';
 import { FieldMatcher } from '../types/transformations';
@@ -34,6 +35,7 @@ export interface ApplyFieldOverrideOptions {
   fieldOptions: FieldConfigSource;
   replaceVariables: InterpolateFunction;
   theme: GrafanaTheme;
+  timeZone?: TimeZone;
   autoMinMax?: boolean;
 }
 
@@ -164,7 +166,11 @@ export function applyFieldOverrides(options: ApplyFieldOverrideOptions): DataFra
         type,
       };
       // and set the display processor using it
-      f.display = getDisplayProcessor({ field: f, theme: options.theme });
+      f.display = getDisplayProcessor({
+        field: f,
+        theme: options.theme,
+        timeZone: options.timeZone,
+      });
       return f;
     });
 

packages/grafana-ui/src/components/DataLinks/DataLinkSuggestions.tsx

@@ -11,6 +11,7 @@ import { stylesFactory } from '../../themes';
 export enum VariableOrigin {
   Series = 'series',
   Field = 'field',
+  Fields = 'fields',
   Value = 'value',
   BuiltIn = 'built-in',
   Template = 'template',

public/app/features/panel/panellinks/fieldDisplayValuesProxy.test.ts

@@ -0,0 +1,66 @@
+import { toDataFrame, applyFieldOverrides, GrafanaTheme } from '@grafana/data';
+import { getFieldDisplayValuesProxy } from './fieldDisplayValuesProxy';
+
+describe('getFieldDisplayValuesProxy', () => {
+  const data = applyFieldOverrides({
+    data: [
+      toDataFrame({
+        fields: [
+          { name: 'Time', values: [1, 2, 3] },
+          {
+            name: 'power',
+            values: [100, 200, 300],
+            config: {
+              title: 'The Power',
+            },
+          },
+          {
+            name: 'Last',
+            values: ['a', 'b', 'c'],
+          },
+        ],
+      }),
+    ],
+    fieldOptions: {
+      defaults: {},
+      overrides: [],
+    },
+    replaceVariables: (val: string) => val,
+    timeZone: 'utc',
+    theme: {} as GrafanaTheme,
+    autoMinMax: true,
+  })[0];
+
+  it('should define all display functions', () => {
+    // Field display should be set
+    for (const field of data.fields) {
+      expect(field.display).toBeDefined();
+    }
+  });
+
+  it('should format the time values in UTC', () => {
+    // Test Proxies in general
+    const p = getFieldDisplayValuesProxy(data, 0);
+    const time = p.Time;
+    expect(time.numeric).toEqual(1);
+    expect(time.text).toEqual('1970-01-01 00:00:00');
+
+    // Should get to the same values by name or index
+    const time2 = p[0];
+    expect(time2.toString()).toEqual(time.toString());
+  });
+
+  it('Lookup by name, index, or title', () => {
+    const p = getFieldDisplayValuesProxy(data, 2);
+    expect(p.power.numeric).toEqual(300);
+    expect(p['power'].numeric).toEqual(300);
+    expect(p['The Power'].numeric).toEqual(300);
+    expect(p[1].numeric).toEqual(300);
+  });
+
+  it('should return undefined when missing', () => {
+    const p = getFieldDisplayValuesProxy(data, 0);
+    expect(p.xyz).toBeUndefined();
+    expect(p[100]).toBeUndefined();
+  });
+});

public/app/features/panel/panellinks/fieldDisplayValuesProxy.ts

@@ -0,0 +1,35 @@
+import { DisplayValue, DataFrame, formattedValueToString, getDisplayProcessor } from '@grafana/data';
+import { config } from '@grafana/runtime';
+import toNumber from 'lodash/toNumber';
+
+export function getFieldDisplayValuesProxy(frame: DataFrame, rowIndex: number): Record<string, DisplayValue> {
+  return new Proxy({} as Record<string, DisplayValue>, {
+    get: (obj: any, key: string) => {
+      // 1. Match the name
+      let field = frame.fields.find(f => key === f.name);
+      if (!field) {
+        // 2. Match the array index
+        const k = toNumber(key);
+        field = frame.fields[k];
+      }
+      if (!field) {
+        // 3. Match the title
+        field = frame.fields.find(f => key === f.config.title);
+      }
+      if (!field) {
+        return undefined;
+      }
+      if (!field.display) {
+        // Lazy load the display processor
+        field.display = getDisplayProcessor({
+          field,
+          theme: config.theme,
+        });
+      }
+      const raw = field.values.get(rowIndex);
+      const disp = field.display(raw);
+      disp.toString = () => formattedValueToString(disp);
+      return disp;
+    },
+  });
+}

public/app/features/panel/panellinks/linkSuppliers.test.ts

@@ -1,5 +1,15 @@
-import { getLinksFromLogsField } from './linkSuppliers';
-import { ArrayVector, dateTime, Field, FieldType } from '@grafana/data';
+import { getLinksFromLogsField, getFieldLinksSupplier } from './linkSuppliers';
+import {
+  ArrayVector,
+  dateTime,
+  Field,
+  FieldType,
+  toDataFrame,
+  applyFieldOverrides,
+  GrafanaTheme,
+  FieldDisplay,
+  DataFrameView,
+} from '@grafana/data';
 import { getLinkSrv, LinkService, LinkSrv, setLinkSrv } from './link_srv';
 import { TemplateSrv } from '../../templating/template_srv';
 import { TimeSrv } from '../../dashboard/services/TimeSrv';
@@ -58,4 +68,131 @@ describe('getLinksFromLogsField', () => {
     const links = getLinksFromLogsField(field, 2);
     expect(links.length).toBe(0);
   });
+
+  it('links to items on the row', () => {
+    const data = applyFieldOverrides({
+      data: [
+        toDataFrame({
+          name: 'Hello Templates',
+          refId: 'ZZZ',
+          fields: [
+            { name: 'Time', values: [1, 2, 3] },
+            {
+              name: 'Power',
+              values: [100.2000001, 200, 300],
+              config: {
+                unit: 'kW',
+                decimals: 3,
+                title: 'TheTitle',
+              },
+            },
+            {
+              name: 'Last',
+              values: ['a', 'b', 'c'],
+              config: {
+                links: [
+                  {
+                    title: 'By Name',
+                    url: 'http://go/${__data.fields.Power}',
+                  },
+                  {
+                    title: 'By Index',
+                    url: 'http://go/${__data.fields[1]}',
+                  },
+                  {
+                    title: 'By Title',
+                    url: 'http://go/${__data.fields[TheTitle]}',
+                  },
+                  {
+                    title: 'Numeric Value',
+                    url: 'http://go/${__data.fields.Power.numeric}',
+                  },
+                  {
+                    title: 'Text (no suffix)',
+                    url: 'http://go/${__data.fields.Power.text}',
+                  },
+                  {
+                    title: 'Unknown Field',
+                    url: 'http://go/${__data.fields.XYZ}',
+                  },
+                  {
+                    title: 'Data Frame name',
+                    url: 'http://go/${__data.name}',
+                  },
+                  {
+                    title: 'Data Frame refId',
+                    url: 'http://go/${__data.refId}',
+                  },
+                ],
+              },
+            },
+          ],
+        }),
+      ],
+      fieldOptions: {
+        defaults: {},
+        overrides: [],
+      },
+      replaceVariables: (val: string) => val,
+      timeZone: 'utc',
+      theme: {} as GrafanaTheme,
+      autoMinMax: true,
+    })[0];
+
+    const rowIndex = 0;
+    const colIndex = data.fields.length - 1;
+    const field = data.fields[colIndex];
+    const fieldDisp: FieldDisplay = {
+      name: 'hello',
+      field: field.config,
+      view: new DataFrameView(data),
+      rowIndex,
+      colIndex,
+      display: field.display!(field.values.get(rowIndex)),
+    };
+
+    const supplier = getFieldLinksSupplier(fieldDisp);
+    const links = supplier.getLinks({}).map(m => {
+      return {
+        title: m.title,
+        href: m.href,
+      };
+    });
+    expect(links).toMatchInlineSnapshot(`
+      Array [
+        Object {
+          "href": "http://go/100.200 kW",
+          "title": "By Name",
+        },
+        Object {
+          "href": "http://go/100.200 kW",
+          "title": "By Index",
+        },
+        Object {
+          "href": "http://go/100.200 kW",
+          "title": "By Title",
+        },
+        Object {
+          "href": "http://go/100.2000001",
+          "title": "Numeric Value",
+        },
+        Object {
+          "href": "http://go/100.200",
+          "title": "Text (no suffix)",
+        },
+        Object {
+          "href": "http://go/\${__data.fields.XYZ}",
+          "title": "Unknown Field",
+        },
+        Object {
+          "href": "http://go/Hello Templates",
+          "title": "Data Frame name",
+        },
+        Object {
+          "href": "http://go/ZZZ",
+          "title": "Data Frame refId",
+        },
+      ]
+    `);
+  });
 });

public/app/features/panel/panellinks/linkSuppliers.ts

@@ -8,8 +8,11 @@ import {
   ScopedVar,
   Field,
   LinkModel,
+  formattedValueToString,
+  DisplayValue,
 } from '@grafana/data';
 import { getLinkSrv } from './link_srv';
+import { getFieldDisplayValuesProxy } from './fieldDisplayValuesProxy';
 
 interface SeriesVars {
   name?: string;
@@ -29,10 +32,17 @@ interface ValueVars {
   calc?: string;
 }
 
+interface DataViewVars {
+  name?: string;
+  refId?: string;
+  fields?: Record<string, DisplayValue>;
+}
+
 interface DataLinkScopedVars extends ScopedVars {
   __series?: ScopedVar<SeriesVars>;
   __field?: ScopedVar<FieldVars>;
   __value?: ScopedVar<ValueVars>;
+  __data?: ScopedVar<DataViewVars>;
 }
 
 /**
@@ -71,24 +81,36 @@ export const getFieldLinksSupplier = (value: FieldDisplay): LinkModelSupplier<Fi
           };
         }
 
-        if (value.rowIndex) {
+        if (!isNaN(value.rowIndex)) {
           const { timeField } = getTimeField(dataFrame);
           scopedVars['__value'] = {
             value: {
               raw: field.values.get(value.rowIndex),
               numeric: value.display.numeric,
-              text: value.display.text,
+              text: formattedValueToString(value.display),
               time: timeField ? timeField.values.get(value.rowIndex) : undefined,
             },
             text: 'Value',
           };
+
+          // Expose other values on the row
+          if (value.view) {
+            scopedVars['__data'] = {
+              value: {
+                name: dataFrame.name,
+                refId: dataFrame.refId,
+                fields: getFieldDisplayValuesProxy(dataFrame, value.rowIndex!),
+              },
+              text: 'Data',
+            };
+          }
         } else {
           // calculation
           scopedVars['__value'] = {
             value: {
               raw: value.display.numeric,
               numeric: value.display.numeric,
-              text: value.display.text,
+              text: formattedValueToString(value.display),
               calc: value.name,
             },
             text: 'Value',

public/app/features/panel/panellinks/link_srv.ts

@@ -6,7 +6,16 @@ import { appendQueryToUrl, toUrlParams } from 'app/core/utils/url';
 import { sanitizeUrl } from 'app/core/utils/text';
 import { getConfig } from 'app/core/config';
 import { VariableSuggestion, VariableOrigin, DataLinkBuiltInVars } from '@grafana/ui';
-import { DataLink, KeyValue, deprecationWarning, LinkModel, DataFrame, ScopedVars } from '@grafana/data';
+import {
+  DataLink,
+  KeyValue,
+  deprecationWarning,
+  LinkModel,
+  DataFrame,
+  ScopedVars,
+  FieldType,
+  Field,
+} from '@grafana/data';
 
 const timeRangeVars = [
   {
@@ -110,15 +119,81 @@ const getFieldVars = (dataFrames: DataFrame[]) => {
     })),
   ];
 };
+
+const getDataFrameVars = (dataFrames: DataFrame[]) => {
+  let numeric: Field = undefined;
+  let title: Field = undefined;
+  const suggestions: VariableSuggestion[] = [];
+  const keys: KeyValue<true> = {};
+  for (const df of dataFrames) {
+    for (const f of df.fields) {
+      if (keys[f.name]) {
+        continue;
+      }
+      suggestions.push({
+        value: `__data.fields[${f.name}]`,
+        label: `${f.name}`,
+        documentation: `Formatted value for ${f.name} on the same row`,
+        origin: VariableOrigin.Fields,
+      });
+      keys[f.name] = true;
+      if (!numeric && f.type === FieldType.number) {
+        numeric = f;
+      }
+      if (!title && f.config.title && f.config.title !== f.name) {
+        title = f;
+      }
+    }
+  }
+
+  if (suggestions.length) {
+    suggestions.push({
+      value: `__data.fields[0]`,
+      label: `Select by index`,
+      documentation: `Enter the field order`,
+      origin: VariableOrigin.Fields,
+    });
+  }
+  if (numeric) {
+    suggestions.push({
+      value: `__data.fields[${numeric.name}].numeric`,
+      label: `Show numeric value`,
+      documentation: `the numeric field value`,
+      origin: VariableOrigin.Fields,
+    });
+    suggestions.push({
+      value: `__data.fields[${numeric.name}].text`,
+      label: `Show text value`,
+      documentation: `the text value`,
+      origin: VariableOrigin.Fields,
+    });
+  }
+  if (title) {
+    suggestions.push({
+      value: `__data.fields[${title.config.title}]`,
+      label: `Select by title`,
+      documentation: `Use the title to pick the field`,
+      origin: VariableOrigin.Fields,
+    });
+  }
+  return suggestions;
+};
+
 export const getDataLinksVariableSuggestions = (dataFrames: DataFrame[]): VariableSuggestion[] => {
-  const fieldVars = getFieldVars(dataFrames);
   const valueTimeVar = {
     value: `${DataLinkBuiltInVars.valueTime}`,
     label: 'Time',
     documentation: 'Time value of the clicked datapoint (in ms epoch)',
     origin: VariableOrigin.Value,
   };
-  return [...seriesVars, ...fieldVars, ...valueVars, valueTimeVar, ...getPanelLinksVariableSuggestions()];
+  return [
+    ...seriesVars,
+    ...getFieldVars(dataFrames),
+    ...valueVars,
+    valueTimeVar,
+    ...getDataFrameVars(dataFrames),
+    ...getPanelLinksVariableSuggestions(),
+  ];
 };
 
 export const getCalculationValueDataLinksVariableSuggestions = (dataFrames: DataFrame[]): VariableSuggestion[] => {