NoSuchMethodError: The getter 'index' was called on null. Receiver: null

[Eric-Dev-Live]

After Running

flutter pub run build_runner build --delete-conflicting-outputs

am getting

[SEVERE] sqfentity_gen:property_sqfentity on lib/models/kikao.dart:
NoSuchMethodError: The getter 'index' was called on null.
Receiver: null

• Dart SDK Version (dart --version).

Dart SDK version: 2.10.1 (stable) (Tue Oct 6 10:54:20 2020 +0200) on "macos_x64"

build_runner: ^1.10.3
build_runner_core: ^6.0.3
build_verify: ^1.1.1

Am using sqfEntity_gen to generate sqflite models and helper methods

import 'dart:convert';
import 'dart:typed_data';

import 'package:http/http.dart' as http;
import 'package:flutter/material.dart';
import 'package:sqfentity/sqfentity.dart';
import 'package:sqfentity_gen/sqfentity_gen.dart';

part 'kikao.g.dart';

// Define the 'tableDummy' constant as SqfEntityTable for the dummy table.
const tableDummy = SqfEntityTable(
    tableName: 'dummy',
    primaryKeyName: 'id',
    primaryKeyType: PrimaryKeyType.integer_auto_incremental,
    useSoftDeleting: true,
    modelName: null,
    fields: [
      SqfEntityField('name', DbType.text),
      SqfEntityField('isActive', DbType.bool, defaultValue: true),
    ]);

const seqIdentity = SqfEntitySequence(
  sequenceName: 'identity',
  // maxValue:  10000, /* optional. default is max int (9.223.372.036.854.775.807) */
  // modelName: 'SQEidentity',
  /* optional. SqfEntity will set it to sequenceName automatically when the modelName is null*/
  // cycle : false,   /* optional. default is false; */
  // minValue = 0;    /* optional. default is 0 */
  // incrementBy = 1; /* optional. default is 1 */
  // startWith = 0;   /* optional. default is 0 */
);

@SqfEntityBuilder(myDbModel)
const myDbModel = SqfEntityModel(
  modelName: 'MyDbModel',
  databaseName: 'sampleORM.db',
  password: null,
  databaseTables: [
    tableDummy,
  ],
  sequences: [seqIdentity],
  bundledDatabasePath: null,
);

sqfentity: ^1.4.0+1
sqfentity_gen: ^1.4.0

[jakemac53]

Can you post a stack trace? You may need to run with --verbose enabled.

[colinmcintyre]

I too am receiving the same error. It has only started since upgrading flutter to
flutter --version Flutter 1.24.0-2.0.pre.92 • channel master • https://github.com/flutter/flutter.git Framework • revision 8a25557619 (32 hours ago) • 2020-10-20 11:58:49 -0700 Engine • revision ea2aea1c61 Tools • Dart 2.11.0 (build 2.11.0-234.0.dev)

[INFO] Generating build script...
[INFO] Generating build script completed, took 300ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 95ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 622ms

[INFO] Running build...
[INFO] 1.1s elapsed, 0/16 actions completed.
[INFO] 2.1s elapsed, 0/16 actions completed.
[INFO] 3.1s elapsed, 0/16 actions completed.
[INFO] 6.2s elapsed, 0/16 actions completed.
[INFO] 11.7s elapsed, 1/16 actions completed.
[INFO] 12.8s elapsed, 16/23 actions completed.
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
SQFENTITY GENERATOR STARTED... instance Of:* database
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
SQFENTITY GENERATOR: builder initialized (* database)...
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
SQFENTITY_GEN.DART: recognizing Tables (* database)
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: registrants
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: registrant,tableName:registrants
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: payload_grouping
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: payloadGroup,tableName:payload_grouping
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: save_state
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: saveState,tableName:save_state
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: waypoints
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: geolocations
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: geoLocation,tableName:geolocations
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: wayPoint,tableName:waypoints
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: payload
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: payloadItem,tableName:payload
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: polylines
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
init() -> modelname: line,tableName:polylines
[WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:

• database Model recognized succesfuly
  [WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
  7 tables found in * database
  [WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
• database converted to SqfEntityModelBase successfully
  [WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:
  createEntites() started
  [WARNING] sqfentity_gen:property_sqfentity on lib/database/database.dart:

OBJECTTYPE.TABLE registrants(expiry,name,code,company,signaturePrompt,country,voice,) converting to entity
[SEVERE] sqfentity_gen:property_sqfentity on lib/database/database.dart:

NoSuchMethodError: The getter 'index' was called on null.
Receiver: null
Tried calling: index
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------FormBuilder: SqfEntityTable
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
SQFENTITY_GEN.DART: recognizing Tables (SqfEntityTable)
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: registrants
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: registrant,tableName:registrants
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: payload_grouping
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: payloadGroup,tableName:payload_grouping
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: save_state
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: saveState,tableName:save_state
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: waypoints
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: geolocations
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: geoLocation,tableName:geolocations
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: wayPoint,tableName:waypoints
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: payload
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: payloadItem,tableName:payload
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
-------------------------------------------------------TABLE RECOGNIZING: polylines
[WARNING] sqfentity_gen:property_sqfentity_forms on lib/database/database.dart:
init() -> modelname: line,tableName:polylines
[INFO] Running build completed, took 14.7s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 47ms

[SEVERE] Failed after 14.7s
pub finished with exit code 1

[jakemac53]

@colinmcintyre can you run with --verbose? We should see a stack trace then for the SEVERE log with the error.

[colinmcintyre]

@jakemac53 Hi. Please find below the full output with --verbose. And thank you for looking into this, much appreciated.

flutter pub run build_runner build --delete-conflicting-outputs --verbose

[ +97 ms] executing: [D:\Program Files\flutter/] git -c log.showSignature=false log -n 1 --pretty=format:%H
[ +33 ms] Exit code 0 from: git -c log.showSignature=false log -n 1 --pretty=format:%H
[ ] fdac8a9d1f321388d71e35f825b40c05901e74f0
[ ] executing: [D:\Program Files\flutter/] git tag --points-at HEAD
[ +22 ms] Exit code 0 from: git tag --points-at HEAD
[ +1 ms] executing: [D:\Program Files\flutter/] git describe --match ..* --first-parent --long --tags
[ +39 ms] Exit code 0 from: git describe --match ..* --first-parent --long --tags
[ ] 1.24.0-3.0.pre-57-gfdac8a9d1f
[ +6 ms] executing: [D:\Program Files\flutter/] git rev-parse --abbrev-ref --symbolic @{u}
[ +15 ms] Exit code 0 from: git rev-parse --abbrev-ref --symbolic @{u}
[ ] origin/master
[ ] executing: [D:\Program Files\flutter/] git ls-remote --get-url origin
[ +10 ms] Exit code 0 from: git ls-remote --get-url origin
[ ] https://github.com/flutter/flutter.git
[ +38 ms] executing: [D:\Program Files\flutter/] git rev-parse --abbrev-ref HEAD
[ +12 ms] Exit code 0 from: git rev-parse --abbrev-ref HEAD
[ ] master
[ +38 ms] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[ +2 ms] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ +53 ms] Artifact Instance of 'MaterialFonts' is not required, skipping update.
[ ] Artifact Instance of 'GradleWrapper' is not required, skipping update.
[ ] Artifact Instance of 'AndroidMavenArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidGenSnapshotArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'AndroidInternalBuildArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterWebSdk' is not required, skipping update.
[ ] Artifact Instance of 'FlutterSdk' is not required, skipping update.
[ ] Artifact Instance of 'WindowsEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'MacOSEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxEngineArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'LinuxFuchsiaSDKArtifacts' is not required, skipping update.
[ +2 ms] Artifact Instance of 'MacOSFuchsiaSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerSDKArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FlutterRunnerDebugSymbols' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'IosUsbArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'FontSubsetArtifacts' is not required, skipping update.
[ ] Artifact Instance of 'PubDependencies' is not required, skipping update.
[ +17 ms] executing: D:\Program Files\flutter\bin\cache\dart-sdk\bin\pub.bat run build_runner build --delete-conflicting-outputs --verbose
[INFO] Generating build script...
[INFO] Generating build script completed, took 292ms

[INFO] BuildDefinition:Initializing inputs
[INFO] BuildDefinition:Reading cached asset graph...
[INFO] BuildDefinition:Reading cached asset graph completed, took 107ms

[INFO] BuildDefinition:Checking for updates since last build...
[INFO] BuildDefinition:Checking for updates since last build completed, took 636ms

[INFO] Build:Running build...
[INFO] Build:Running build completed, took 18ms

[INFO] Build:Caching finalized dependency graph...
[INFO] Build:Caching finalized dependency graph completed, took 50ms

[SEVERE] sqfentity_gen:property_sqfentity on lib/database/database.dart (cached):

NoSuchMethodError: The getter 'index' was called on null.
Receiver: null
Tried calling: index
dart:core Object.noSuchMethod
package:sqfentity_gen/sqfentity_base.dart 3400:100 SqfEntityFieldBase.toFromMapString
package:sqfentity_gen/sqfentity_base.dart 983:36 SqfEntityObjectBuilder.__toFromMapString
package:sqfentity_gen/sqfentity_base.dart 595:34 SqfEntityObjectBuilder._toFromMapString
package:sqfentity_gen/sqfentity_base.dart 627:8 SqfEntityObjectBuilder.toString
package:sqfentity_gen/sqfentity_gen.dart 687:51 SqfEntityConverter.createEntites
package:sqfentity_gen/src/sqfentity_generator.dart 40:49 SqfEntityGenerator.generateForAnnotatedElement
package:source_gen/src/generator_for_annotation.dart 53:30 GeneratorForAnnotation.generate
package:source_gen/src/builder.dart 303:33 _generate
package:source_gen/src/builder.dart 79:15 _Builder._generateForLibrary
package:source_gen/src/builder.dart 71:11 _Builder.build
package:build runBuilder
package:build_runner_core/src/generate/build_impl.dart 485:19 _SingleBuild._runForInput...
package:build_runner_core/src/generate/performance_tracker.dart 302:15 _NoOpBuilderActionTracker.trackStage
package:build_runner_core/src/generate/build_impl.dart 483:23 _SingleBuild._runForInput..
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._runForInput..
package:timing/src/timing.dart 222:44 NoOpTimeTracker.track
package:build_runner_core/src/generate/build_impl.dart 440:22 _SingleBuild._runForInput.
package:pool/pool.dart 127:28 Pool.withResource
package:build_runner_core/src/generate/build_impl.dart 436:17 _SingleBuild._runForInput
package:build_runner_core/src/generate/build_impl.dart 374:38 _SingleBuild._runBuilder.
dart:async Future.wait
package:build_runner_core/src/generate/build_impl.dart 373:36 _SingleBuild._runBuilder
package:build_runner_core/src/generate/build_impl.dart 319:20 _SingleBuild._runPhases..
dart:async _completeOnAsyncReturn
package:build_runner_core/src/generate/build_impl.dart _SingleBuild._matchingPrimaryInputs

#2 PackagesForwardCommand.runCommand (package:flutter_tools/src/commands/packages.dart:257:15)
#3 FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:1029:18)
#4 _rootRunUnary (dart:async/zone.dart:1198:47)
#5 _CustomZone.runUnary (dart:async/zone.dart:1100:19)
#6 _FutureListener.handleValue (dart:async/future_impl.dart:143:18) :7)
#7 Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:696:45) packages.dart:257:15)
#8 Future._propagateToListeners (dart:async/future_impl.dart:725:32) flutter_command.dart:1029:18)
#9 Future._completeWithValue (dart:async/future_impl.dart:529:5)
#10 Future._asyncCompleteWithValue. (dart:async/future_impl.dart:567:7)
#11 _rootRun (dart:async/zone.dart:1190:13) pl.dart:696:45)
#12 _CustomZone.run (dart:async/zone.dart:1093:19)
#13 _CustomZone.runGuarded (dart:async/zone.dart:997:7)
#14 _CustomZone.bindCallbackGuarded. (dart:async/zone.dimpl.dart:567:7)art:1037:23)
#15 _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#16 _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#17 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:11art:1037:23)8:13)
#18 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:169:5) 8:13)
art:169:5)

[ +262 ms] ensureAnalyticsSent: 256ms
[ +2 ms] Running shutdown hooks
[ +12 ms] Shutdown hooks complete
[ +1 ms] exiting with code 1

[jakemac53]

This looks like an issue with the sqfentity_gen package, specifically that package is trying to use the index operator ([) on a null object. I would refile this issue on them https://github.com/hhtokpinar/sqfEntity/issues/new and attach the same stack trace.

It is possibly this line here https://github.com/hhtokpinar/sqfEntity/blob/master/sqfentity_gen/lib/sqfentity_base.dart#L3403, dartType[dbType.index].toString() (dartType may be null there?). Can't tell for sure as I don't see tags on the repo to put me at the exact state you are in so I can't match up the stack trace exactly.

[colinmcintyre]

@jakemac53 Thank you for looking into this. I have filed the issue with sqfentity and will see how we go. If you dont mind i will also grab your bottom paragraph to add to issue report.

Thanks

[jakemac53]

Yep of course! We can also leave this open for now but if you can close it if/when the issue is resolved that would be appreciated