[ML] Improve support for script and aggregation fields in anomaly detection jobs

x-pack/plugins/ml/common/constants/messages.ts

@@ -442,6 +442,16 @@ export const getMessages = once(() => {
       url:
         'https://www.elastic.co/guide/en/elasticsearch/reference/{{version}}/ml-job-resource.html#ml-job-resource',
     },
+    missing_summary_count_field_name: {
+      status: VALIDATION_STATUS.ERROR,
+      text: i18n.translate(
+        'xpack.ml.models.jobValidation.messages.missingSummaryCountFieldNameMessage',
+        {
+          defaultMessage:
+            'A job configured with a datafeed with aggregations must set summary_count_field_name; use doc_count or suitable alternative.',
+        }
+      ),
+    },
     skipped_extended_tests: {
       status: VALIDATION_STATUS.WARNING,
       text: i18n.translate('xpack.ml.models.jobValidation.messages.skippedExtendedTestsMessage', {

x-pack/plugins/ml/common/types/anomaly_detection_jobs/datafeed.ts

@@ -19,7 +19,7 @@ export interface Datafeed {
   job_id: JobId;
   query: object;
   query_delay?: string;
-  script_fields?: object;
+  script_fields?: Record<string, any>;
   scroll_size?: number;
   delayed_data_check_config?: object;
   indices_options?: IndicesOptions;
@@ -30,16 +30,17 @@ export interface ChunkingConfig {
   time_span?: string;
 }
 
-interface Aggregation {
-  buckets: {
+export type Aggregation = Record<
+  string,
+  {
     date_histogram: {
       field: string;
       fixed_interval: string;
     };
     aggregations?: { [key: string]: any };
     aggs?: { [key: string]: any };
-  };
-}
+  }
+>;
 
 interface IndicesOptions {
   expand_wildcards?: 'all' | 'open' | 'closed' | 'hidden' | 'none';

x-pack/plugins/ml/common/types/fields.ts

@@ -89,3 +89,16 @@ export const mlCategory: Field = {
   type: ES_FIELD_TYPES.KEYWORD,
   aggregatable: false,
 };
+
+export interface FieldAggCardinality {
+  field: string;
+  percent?: any;
+}
+
+export interface ScriptAggCardinality {
+  script: any;
+}
+
+export interface AggCardinality {
+  cardinality: FieldAggCardinality | ScriptAggCardinality;
+}

x-pack/plugins/ml/common/util/datafeed_utils.ts

@@ -0,0 +1,22 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License;
+ * you may not use this file except in compliance with the Elastic License.
+ */
+
+import { Aggregation, Datafeed } from '../types/anomaly_detection_jobs';
+
+export const getDatafeedAggregations = (
+  datafeedConfig: Partial<Datafeed> | undefined
+): Aggregation | undefined => {
+  if (datafeedConfig?.aggregations !== undefined) return datafeedConfig.aggregations;
+  if (datafeedConfig?.aggs !== undefined) return datafeedConfig.aggs;
+  return undefined;
+};
+
+export const getAggregationBucketsName = (aggregations: any): string | undefined => {
+  if (typeof aggregations === 'object') {
+    const keys = Object.keys(aggregations);
+    return keys.length > 0 ? keys[0] : undefined;
+  }
+};

x-pack/plugins/ml/common/util/job_utils.test.ts

@@ -188,8 +188,8 @@ describe('ML - job utils', () => {
       expect(isTimeSeriesViewDetector(job, 3)).toBe(false);
     });
 
-    test('returns false for a detector using a script field as a metric field_name', () => {
-      expect(isTimeSeriesViewDetector(job, 4)).toBe(false);
+    test('returns true for a detector using a script field as a metric field_name', () => {
+      expect(isTimeSeriesViewDetector(job, 4)).toBe(true);
     });
   });
 
@@ -281,6 +281,7 @@ describe('ML - job utils', () => {
       expect(isSourceDataChartableForDetector(job, 22)).toBe(true);
       expect(isSourceDataChartableForDetector(job, 23)).toBe(true);
       expect(isSourceDataChartableForDetector(job, 24)).toBe(true);
+      expect(isSourceDataChartableForDetector(job, 37)).toBe(true);
     });
 
     test('returns false for expected detectors', () => {
@@ -296,7 +297,6 @@ describe('ML - job utils', () => {
       expect(isSourceDataChartableForDetector(job, 34)).toBe(false);
       expect(isSourceDataChartableForDetector(job, 35)).toBe(false);
       expect(isSourceDataChartableForDetector(job, 36)).toBe(false);
-      expect(isSourceDataChartableForDetector(job, 37)).toBe(false);
     });
   });
 

x-pack/plugins/ml/common/util/job_utils.ts

@@ -21,6 +21,7 @@ import { MlServerLimits } from '../types/ml_server_info';
 import { JobValidationMessage, JobValidationMessageId } from '../constants/messages';
 import { ES_AGGREGATION, ML_JOB_AGGREGATION } from '../constants/aggregation_types';
 import { MLCATEGORY } from '../constants/field_types';
+import { getDatafeedAggregations } from './datafeed_utils';
 
 export interface ValidationResults {
   valid: boolean;
@@ -95,7 +96,6 @@ export function isSourceDataChartableForDetector(job: CombinedJob, detectorIndex
       // Perform extra check to see if the detector is using a scripted field.
       const scriptFields = Object.keys(job.datafeed_config.script_fields);
       isSourceDataChartable =
-        scriptFields.indexOf(dtr.field_name!) === -1 &&
         scriptFields.indexOf(dtr.partition_field_name!) === -1 &&
         scriptFields.indexOf(dtr.by_field_name!) === -1 &&
         scriptFields.indexOf(dtr.over_field_name!) === -1;
@@ -560,6 +560,27 @@ export function basicDatafeedValidation(datafeed: Datafeed): ValidationResults {
   };
 }
 
+export function basicJobAndDatafeedValidation(job: Job, datafeed: Datafeed): ValidationResults {
+  const messages: ValidationResults['messages'] = [];
+  let valid = true;
+
+  if (datafeed && job) {
+    const datafeedAggregations = getDatafeedAggregations(datafeed);
+
+    if (datafeedAggregations !== undefined && !job.analysis_config?.summary_count_field_name) {
+      valid = false;
+      messages.push({ id: 'missing_summary_count_field_name' });
+    }
+  }
+
+  return {
+    messages,
+    valid,
+    contains: (id) => messages.some((m) => id === m.id),
+    find: (id) => messages.find((m) => id === m.id),
+  };
+}
+
 export function validateModelMemoryLimit(job: Job, limits: MlServerLimits): ValidationResults {
   const messages: ValidationResults['messages'] = [];
   let valid = true;

x-pack/plugins/ml/common/util/validation_utils.ts

@@ -31,3 +31,22 @@ export function isValidJson(json: string) {
     return false;
   }
 }
+
+export function findAggField(aggs: Record<string, any>, fieldName: string): any {
+  let value;
+  Object.keys(aggs).some(function (k) {
+    if (k === fieldName) {
+      value = aggs[k];
+      return true;
+    }
+    if (aggs.hasOwnProperty(k) && typeof aggs[k] === 'object') {
+      value = findAggField(aggs[k], fieldName);
+      return value !== undefined;
+    }
+  });
+  return value;
+}
+
+export function isValidAggregationField(aggs: Record<string, any>, fieldName: string): boolean {
+  return findAggField(aggs, fieldName) !== undefined;
+}

x-pack/plugins/ml/public/application/explorer/explorer_charts/explorer_charts_container_service.js

@@ -125,7 +125,8 @@ export const anomalyDataChange = function (
           config.timeField,
           range.min,
           range.max,
-          bucketSpanSeconds * 1000
+          bucketSpanSeconds * 1000,
+          config.datafeedConfig
         )
         .toPromise();
     } else {

x-pack/plugins/ml/public/application/jobs/new_job/common/job_creator/util/model_memory_estimator.ts

@@ -134,6 +134,7 @@ export const useModelMemoryEstimator = (
   // Update model memory estimation payload on the job creator updates
   useEffect(() => {
     modelMemoryEstimator.update({
+      datafeedConfig: jobCreator.datafeedConfig,
       analysisConfig: jobCreator.jobConfig.analysis_config,
       indexPattern: jobCreator.indexPatternTitle,
       query: jobCreator.datafeedConfig.query,

x-pack/plugins/ml/public/application/jobs/new_job/common/job_validator/job_validator.ts

@@ -10,6 +10,7 @@ import { map, startWith, tap } from 'rxjs/operators';
 import {
   basicJobValidation,
   basicDatafeedValidation,
+  basicJobAndDatafeedValidation,
 } from '../../../../../../common/util/job_utils';
 import { getNewJobLimits } from '../../../../services/ml_server_info';
 import { JobCreator, JobCreatorType, isCategorizationJobCreator } from '../job_creator';
@@ -53,6 +54,7 @@ export interface BasicValidations {
   scrollSize: Validation;
   categorizerMissingPerPartition: Validation;
   categorizerVaryingPerPartitionField: Validation;
+  summaryCountField: Validation;
 }
 
 export interface AdvancedValidations {
@@ -80,6 +82,7 @@ export class JobValidator {
     scrollSize: { valid: true },
     categorizerMissingPerPartition: { valid: true },
     categorizerVaryingPerPartitionField: { valid: true },
+    summaryCountField: { valid: true },
   };
   private _advancedValidations: AdvancedValidations = {
     categorizationFieldValid: { valid: true },
@@ -197,6 +200,14 @@ export class JobValidator {
       datafeedConfig
     );
 
+    const basicJobAndDatafeedResults = basicJobAndDatafeedValidation(jobConfig, datafeedConfig);
+    populateValidationMessages(
+      basicJobAndDatafeedResults,
+      this._basicValidations,
+      jobConfig,
+      datafeedConfig
+    );
+
     // run addition job and group id validation
     const idResults = checkForExistingJobAndGroupIds(
       this._jobCreator.jobId,
@@ -228,6 +239,9 @@ export class JobValidator {
   public get bucketSpan(): Validation {
     return this._basicValidations.bucketSpan;
   }
+  public get summaryCountField(): Validation {
+    return this._basicValidations.summaryCountField;
+  }
 
   public get duplicateDetectors(): Validation {
     return this._basicValidations.duplicateDetectors;
@@ -297,6 +311,7 @@ export class JobValidator {
       this.duplicateDetectors.valid &&
       this.categorizerMissingPerPartition.valid &&
       this.categorizerVaryingPerPartitionField.valid &&
+      this.summaryCountField.valid &&
       !this.validating &&
       (this._jobCreator.type !== JOB_TYPE.CATEGORIZATION ||
         (this._jobCreator.type === JOB_TYPE.CATEGORIZATION && this.categorizationField))

x-pack/plugins/ml/public/application/jobs/new_job/common/job_validator/util.ts

@@ -193,6 +193,16 @@ export function populateValidationMessages(
     basicValidations.frequency.valid = false;
     basicValidations.frequency.message = invalidTimeIntervalMessage(datafeedConfig.frequency);
   }
+  if (validationResults.contains('missing_summary_count_field_name')) {
+    basicValidations.summaryCountField.valid = false;
+    basicValidations.summaryCountField.message = i18n.translate(
+      'xpack.ml.newJob.wizard.validateJob.summaryCountFieldMissing',
+      {
+        defaultMessage:
+          'A job configured with a datafeed with aggregations must set summary_count_field_name; use doc_count or suitable alternative.',
+      }
+    );
+  }
 }
 
 export function checkForExistingJobAndGroupIds(

x-pack/plugins/ml/public/application/jobs/new_job/pages/components/common/datafeed_preview_flyout/datafeed_preview.tsx

@@ -61,9 +61,12 @@ export const DatafeedPreview: FC<{
     if (combinedJob.datafeed_config && combinedJob.datafeed_config.indices.length) {
       try {
         const resp = await mlJobService.searchPreview(combinedJob);
-        const data = resp.aggregations
-          ? resp.aggregations.buckets.buckets.slice(0, ML_DATA_PREVIEW_COUNT)
-          : resp.hits.hits;
+        let data = resp.hits.hits;
+        // the first item under aggregations can be any name
+        if (typeof resp.aggregations === 'object' && Object.keys(resp.aggregations).length > 0) {
+          const accessor = Object.keys(resp.aggregations)[0];
+          data = resp.aggregations[accessor].buckets.slice(0, ML_DATA_PREVIEW_COUNT);
+        }
 
         setPreviewJsonString(JSON.stringify(data, null, 2));
       } catch (error) {

x-pack/plugins/ml/public/application/jobs/new_job/pages/components/pick_fields_step/components/summary_count_field/description.tsx

@@ -8,8 +8,13 @@ import React, { memo, FC } from 'react';
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n/react';
 import { EuiDescribedFormGroup, EuiFormRow } from '@elastic/eui';
+import { Validation } from '../../../../../common/job_validator';
 
-export const Description: FC = memo(({ children }) => {
+interface Props {
+  validation: Validation;
+}
+
+export const Description: FC<Props> = memo(({ children, validation }) => {
   const title = i18n.translate('xpack.ml.newJob.wizard.pickFieldsStep.summaryCountField.title', {
     defaultMessage: 'Summary count field',
   });
@@ -23,7 +28,7 @@ export const Description: FC = memo(({ children }) => {
         />
       }
     >
-      <EuiFormRow label={title}>
+      <EuiFormRow label={title} error={validation.message} isInvalid={validation.valid === false}>
         <>{children}</>
       </EuiFormRow>
     </EuiDescribedFormGroup>

x-pack/plugins/ml/public/application/jobs/new_job/pages/components/pick_fields_step/components/summary_count_field/summary_count_field.tsx

@@ -17,13 +17,23 @@ import {
 import { Description } from './description';
 
 export const SummaryCountField: FC = () => {
-  const { jobCreator: jc, jobCreatorUpdate, jobCreatorUpdated } = useContext(JobCreatorContext);
+  const {
+    jobCreator: jc,
+    jobCreatorUpdate,
+    jobCreatorUpdated,
+    jobValidator,
+    jobValidatorUpdated,
+  } = useContext(JobCreatorContext);
 
   const jobCreator = jc as MultiMetricJobCreator | PopulationJobCreator | AdvancedJobCreator;
   const { fields } = newJobCapsService;
   const [summaryCountFieldName, setSummaryCountFieldName] = useState(
     jobCreator.summaryCountFieldName
   );
+  const [validation, setValidation] = useState(jobValidator.summaryCountField);
+  useEffect(() => {
+    setValidation(jobValidator.summaryCountField);
+  }, [jobValidatorUpdated]);
 
   useEffect(() => {
     jobCreator.summaryCountFieldName = summaryCountFieldName;
@@ -35,7 +45,7 @@ export const SummaryCountField: FC = () => {
   }, [jobCreatorUpdated]);
 
   return (
-    <Description>
+    <Description validation={validation}>
       <SummaryCountFieldSelect
         fields={fields}
         changeHandler={setSummaryCountFieldName}

x-pack/plugins/ml/public/application/services/ml_api_service/index.ts

@@ -628,13 +628,15 @@ export function mlApiServicesProvider(httpService: HttpService) {
     },
 
     calculateModelMemoryLimit$({
+      datafeedConfig,
       analysisConfig,
       indexPattern,
       query,
       timeFieldName,
       earliestMs,
       latestMs,
     }: {
+      datafeedConfig?: Datafeed;
       analysisConfig: AnalysisConfig;
       indexPattern: string;
       query: any;
@@ -643,6 +645,7 @@ export function mlApiServicesProvider(httpService: HttpService) {
       latestMs: number;
     }) {
       const body = JSON.stringify({
+        datafeedConfig,
         analysisConfig,
         indexPattern,
         query,