diff --git a/database/factories/FlowFactory.php b/database/factories/FlowFactory.php
index 6ccb573..97d354b 100644
--- a/database/factories/FlowFactory.php
+++ b/database/factories/FlowFactory.php
@@ -1,9 +1,9 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
+
+declare(strict_types=1);
 namespace Database\Factories\Playground\Matrix\Models;
 
 use Illuminate\Database\Eloquent\Factories\Factory;
diff --git a/database/factories/MilestoneFactory.php b/database/factories/MilestoneFactory.php
index 227199d..2107ec4 100644
--- a/database/factories/MilestoneFactory.php
+++ b/database/factories/MilestoneFactory.php
@@ -1,9 +1,9 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
+
+declare(strict_types=1);
 namespace Database\Factories\Playground\Matrix\Models;
 
 use Illuminate\Database\Eloquent\Factories\Factory;
diff --git a/database/migrations/2020_01_02_100001_create_matrix_flows_table.php b/database/migrations/2020_01_02_100001_create_matrix_flows_table.php
index 19642fa..ad7f5ca 100644
--- a/database/migrations/2020_01_02_100001_create_matrix_flows_table.php
+++ b/database/migrations/2020_01_02_100001_create_matrix_flows_table.php
@@ -1,15 +1,18 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
 
+declare(strict_types=1);
+
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Query\Expression;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
+/**
+ * \Playground\Matrix\Models\Flow
+ */
 return new class() extends Migration
 {
     /**
@@ -18,6 +21,7 @@
     public function up(): void
     {
         Schema::create('matrix_flows', function (Blueprint $table) {
+
             // Primary key
 
             $table->uuid('id')->primary();
@@ -44,14 +48,8 @@ public function up(): void
             $table->dateTime('planned_start_at')->nullable();
             $table->dateTime('end_at')->nullable()->index();
             $table->dateTime('planned_end_at')->nullable();
-            $table->dateTime('canceled_at')->nullable();
-            $table->dateTime('closed_at')->nullable()->index();
             $table->dateTime('embargo_at')->nullable();
-            $table->dateTime('fixed_at')->nullable();
             $table->dateTime('postponed_at')->nullable();
-            $table->dateTime('published_at')->nullable();
-            $table->dateTime('released_at')->nullable();
-            $table->dateTime('resolved_at')->nullable();
             $table->dateTime('resumed_at')->nullable();
             $table->dateTime('suspended_at')->nullable();
 
@@ -78,48 +76,41 @@ public function up(): void
             $table->bigInteger('x')->nullable();
             $table->bigInteger('y')->nullable();
             $table->bigInteger('z')->nullable();
-            $table->decimal('r', 65, 10)->nullable()->default(null);
-            $table->decimal('theta', 10, 6)->nullable()->default(null);
-            $table->decimal('rho', 10, 6)->nullable()->default(null);
-            $table->decimal('phi', 10, 6)->nullable()->default(null);
-            $table->decimal('elevation', 65, 10)->nullable()->default(null);
-            $table->decimal('latitude', 8, 6)->nullable()->default(null);
-            $table->decimal('longitude', 9, 6)->nullable()->default(null);
+            $table->decimal('r', 65, 10)->nullable();
+            $table->decimal('theta', 10, 6)->nullable();
+            $table->decimal('rho', 10, 6)->nullable();
+            $table->decimal('phi', 10, 6)->nullable();
+            $table->decimal('elevation', 65, 10)->nullable();
+            $table->decimal('latitude', 8, 6)->nullable();
+            $table->decimal('longitude', 9, 6)->nullable();
 
             // Flags
 
             $table->boolean('active')->default(1)->index();
-            $table->boolean('canceled')->default(0);
-            $table->boolean('closed')->default(0);
-            $table->boolean('completed')->default(0);
-            $table->boolean('duplicate')->default(0);
-            $table->boolean('fixed')->default(0);
+            $table->boolean('cron')->default(0)->index();
             $table->boolean('flagged')->default(0);
             $table->boolean('internal')->default(0);
             $table->boolean('locked')->default(0);
             $table->boolean('pending')->default(0);
             $table->boolean('planned')->default(0);
             $table->boolean('problem')->default(0);
-            $table->boolean('published')->default(0);
-            $table->boolean('released')->default(0);
             $table->boolean('retired')->default(0);
-            $table->boolean('resolved')->default(0);
             $table->boolean('suspended')->default(0);
             $table->boolean('unknown')->default(0);
 
-            // Strings
+            // Columns
 
             $table->string('label')->default('');
             $table->string('title')->default('');
             $table->string('byline')->default('');
-            $table->string('slug')->nullable()->default(null)->index();
+            $table->string('slug')->nullable()->index();
             $table->string('url')->default('');
             $table->string('description')->default('');
             $table->string('introduction')->default('');
             $table->mediumText('content')->nullable();
             $table->mediumText('summary')->nullable();
 
-            // UI
+            // Ui
 
             $table->string('icon')->default('');
             $table->string('image')->default('');
@@ -133,6 +124,10 @@ public function up(): void
             $table->json('meta')->nullable()->default(new Expression('(JSON_OBJECT())'));
             $table->json('notes')->nullable()->default(new Expression('(JSON_ARRAY())'))->comment('Array of note objects');
             $table->json('options')->nullable()->default(new Expression('(JSON_OBJECT())'));
+            $table->json('backlog')->nullable()->default(new Expression('(JSON_OBJECT())'));
+            $table->json('board')->nullable()->default(new Expression('(JSON_OBJECT())'));
+            $table->json('roadmap')->nullable()->default(new Expression('(JSON_OBJECT())'));
+            $table->json('sources')->nullable()->default(new Expression('(JSON_OBJECT())'));
         });
     }
 
diff --git a/database/migrations/2020_01_02_100001_create_matrix_milestones_table.php b/database/migrations/2020_01_02_100001_create_matrix_milestones_table.php
index f7542fa..8c18b2c 100644
--- a/database/migrations/2020_01_02_100001_create_matrix_milestones_table.php
+++ b/database/migrations/2020_01_02_100001_create_matrix_milestones_table.php
@@ -1,15 +1,18 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
 
+declare(strict_types=1);
+
 use Illuminate\Database\Migrations\Migration;
 use Illuminate\Database\Query\Expression;
 use Illuminate\Database\Schema\Blueprint;
 use Illuminate\Support\Facades\Schema;
 
+/**
+ * \Playground\Matrix\Models\Milestone
+ */
 return new class() extends Migration
 {
     /**
@@ -18,6 +21,7 @@
     public function up(): void
     {
         Schema::create('matrix_milestones', function (Blueprint $table) {
+
             // Primary key
 
             $table->uuid('id')->primary();
@@ -62,8 +66,8 @@ public function up(): void
             $table->dateTime('postponed_at')->nullable();
             $table->dateTime('published_at')->nullable();
             $table->dateTime('released_at')->nullable();
-            $table->dateTime('resumed_at')->nullable();
             $table->dateTime('resolved_at')->nullable()->index();
+            $table->dateTime('resumed_at')->nullable();
             $table->dateTime('suspended_at')->nullable();
 
             // Permissions
@@ -89,13 +93,13 @@ public function up(): void
             $table->bigInteger('x')->nullable();
             $table->bigInteger('y')->nullable();
             $table->bigInteger('z')->nullable();
-            $table->decimal('r', 65, 10)->nullable()->default(null);
-            $table->decimal('theta', 10, 6)->nullable()->default(null);
-            $table->decimal('rho', 10, 6)->nullable()->default(null);
-            $table->decimal('phi', 10, 6)->nullable()->default(null);
-            $table->decimal('elevation', 65, 10)->nullable()->default(null);
-            $table->decimal('latitude', 8, 6)->nullable()->default(null);
-            $table->decimal('longitude', 9, 6)->nullable()->default(null);
+            $table->decimal('r', 65, 10)->nullable();
+            $table->decimal('theta', 10, 6)->nullable();
+            $table->decimal('rho', 10, 6)->nullable();
+            $table->decimal('phi', 10, 6)->nullable();
+            $table->decimal('elevation', 65, 10)->nullable();
+            $table->decimal('latitude', 8, 6)->nullable();
+            $table->decimal('longitude', 9, 6)->nullable();
 
             // Flags
 
@@ -103,6 +107,7 @@ public function up(): void
             $table->boolean('canceled')->default(0);
             $table->boolean('closed')->default(0);
             $table->boolean('completed')->default(0);
+            $table->boolean('cron')->default(0)->index();
             $table->boolean('duplicate')->default(0);
             $table->boolean('fixed')->default(0);
             $table->boolean('flagged')->default(0);
@@ -118,19 +123,19 @@ public function up(): void
             $table->boolean('suspended')->default(0);
             $table->boolean('unknown')->default(0);
 
-            // Strings
+            // Columns
 
             $table->string('label')->default('');
             $table->string('title')->default('');
             $table->string('byline')->default('');
-            $table->string('slug')->nullable()->default(null)->index();
+            $table->string('slug')->nullable()->index();
             $table->string('url')->default('');
             $table->string('description')->default('');
             $table->string('introduction')->default('');
             $table->mediumText('content')->nullable();
             $table->mediumText('summary')->nullable();
 
-            // UI
+            // Ui
 
             $table->string('icon')->default('');
             $table->string('image')->default('');
diff --git a/src/Models/Flow.php b/src/Models/Flow.php
index 6010df5..f48c52f 100644
--- a/src/Models/Flow.php
+++ b/src/Models/Flow.php
@@ -1,9 +1,9 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
+
+declare(strict_types=1);
 namespace Playground\Matrix\Models;
 
 use Illuminate\Database\Eloquent\Relations\HasOne;
@@ -11,6 +11,83 @@
 
 /**
  * \Playground\Matrix\Models\Flow
+ *
+ * @property string $id
+ * @property ?scalar $created_by_id
+ * @property ?scalar $modified_by_id
+ * @property ?scalar $owned_by_id
+ * @property ?string $parent_id
+ * @property ?string $flow_type
+ * @property ?string $matrix_id
+ * @property ?string $note_id
+ * @property ?string $tag_id
+ * @property ?string $team_id
+ * @property ?Carbon $created_at
+ * @property ?Carbon $updated_at
+ * @property ?Carbon $deleted_at
+ * @property ?Carbon $start_at
+ * @property ?Carbon $planned_start_at
+ * @property ?Carbon $end_at
+ * @property ?Carbon $planned_end_at
+ * @property ?Carbon $embargo_at
+ * @property ?Carbon $postponed_at
+ * @property ?Carbon $resumed_at
+ * @property ?Carbon $suspended_at
+ * @property int $gids
+ * @property int $po
+ * @property int $pg
+ * @property int $pw
+ * @property bool $only_admin
+ * @property bool $only_user
+ * @property bool $only_guest
+ * @property bool $allow_public
+ * @property int $status
+ * @property int $rank
+ * @property int $size
+ * @property ?array $matrix
+ * @property ?int $x
+ * @property ?int $y
+ * @property ?int $z
+ * @property ?double $r
+ * @property ?double $theta
+ * @property ?double $rho
+ * @property ?double $phi
+ * @property ?double $elevation
+ * @property ?double $latitude
+ * @property ?double $longitude
+ * @property bool $active
+ * @property bool $cron
+ * @property bool $flagged
+ * @property bool $internal
+ * @property bool $locked
+ * @property bool $pending
+ * @property bool $planned
+ * @property bool $problem
+ * @property bool $retired
+ * @property bool $suspended
+ * @property bool $unknown
+ * @property string $label
+ * @property string $title
+ * @property string $byline
+ * @property ?string $slug
+ * @property string $url
+ * @property string $description
+ * @property string $introduction
+ * @property ?string $content
+ * @property ?string $summary
+ * @property string $icon
+ * @property string $image
+ * @property string $avatar
+ * @property ?array $ui
+ * @property ?array $assets
+ * @property ?array $flow
+ * @property ?array $meta
+ * @property ?array $notes
+ * @property ?array $options
+ * @property ?array $backlog
+ * @property ?array $board
+ * @property ?array $roadmap
+ * @property ?array $sources
  */
 class Flow extends Model
 {
@@ -27,6 +104,7 @@ class Flow extends Model
         'owned_by_id' => null,
         'parent_id' => null,
         'flow_type' => null,
+        'matrix_id' => null,
         'note_id' => null,
         'tag_id' => null,
         'team_id' => null,
@@ -37,14 +115,8 @@ class Flow extends Model
         'planned_start_at' => null,
         'end_at' => null,
         'planned_end_at' => null,
-        'canceled_at' => null,
-        'closed_at' => null,
         'embargo_at' => null,
-        'fixed_at' => null,
         'postponed_at' => null,
-        'published_at' => null,
-        'released_at' => null,
-        'resolved_at' => null,
         'resumed_at' => null,
         'suspended_at' => null,
         'gids' => 0,
@@ -58,7 +130,7 @@ class Flow extends Model
         'status' => 0,
         'rank' => 0,
         'size' => 0,
-        'matrix' => '',
+        'matrix' => '{}',
         'x' => null,
         'y' => null,
         'z' => null,
@@ -70,21 +142,14 @@ class Flow extends Model
         'latitude' => null,
         'longitude' => null,
         'active' => true,
-        'canceled' => false,
-        'closed' => false,
-        'completed' => false,
-        'duplicate' => false,
-        'fixed' => false,
+        'cron' => false,
         'flagged' => false,
         'internal' => false,
         'locked' => false,
         'pending' => false,
         'planned' => false,
         'problem' => false,
-        'published' => false,
-        'released' => false,
         'retired' => false,
-        'resolved' => false,
         'suspended' => false,
         'unknown' => false,
         'label' => '',
@@ -101,10 +166,14 @@ class Flow extends Model
         'avatar' => '',
         'ui' => '{}',
         'assets' => '{}',
+        'backlog' => '{}',
+        'board' => '{}',
         'flow' => '{}',
         'meta' => '{}',
         'notes' => '[]',
         'options' => '{}',
+        'roadmap' => '{}',
+        'sources' => '{}',
     ];
 
     /**
@@ -116,6 +185,7 @@ class Flow extends Model
         'owned_by_id',
         'parent_id',
         'flow_type',
+        'matrix_id',
         'note_id',
         'tag_id',
         'team_id',
@@ -123,15 +193,9 @@ class Flow extends Model
         'planned_start_at',
         'end_at',
         'planned_end_at',
-        'canceled_at',
-        'closed_at',
         'embargo_at',
-        'fixed_at',
         'postponed_at',
-        'published_at',
-        'released_at',
         'resumed_at',
-        'resolved_at',
         'suspended_at',
         'gids',
         'po',
@@ -156,21 +220,14 @@ class Flow extends Model
         'latitude',
         'longitude',
         'active',
-        'canceled',
-        'closed',
-        'completed',
-        'duplicate',
-        'fixed',
+        'cron',
         'flagged',
         'internal',
         'locked',
         'pending',
         'planned',
         'problem',
-        'published',
-        'released',
         'retired',
-        'resolved',
         'suspended',
         'unknown',
         'label',
@@ -187,10 +244,13 @@ class Flow extends Model
         'avatar',
         'ui',
         'assets',
+        'backlog',
+        'board',
         'flow',
         'meta',
-        'notes',
         'options',
+        'roadmap',
+        'sources',
     ];
 
     /**
@@ -209,15 +269,9 @@ protected function casts(): array
             'planned_start_at' => 'datetime',
             'end_at' => 'datetime',
             'planned_end_at' => 'datetime',
-            'canceled_at' => 'datetime',
-            'closed_at' => 'datetime',
             'embargo_at' => 'datetime',
-            'fixed_at' => 'datetime',
             'postponed_at' => 'datetime',
-            'published_at' => 'datetime',
-            'released_at' => 'datetime',
             'resumed_at' => 'datetime',
-            'resolved_at' => 'datetime',
             'suspended_at' => 'datetime',
             'gids' => 'integer',
             'po' => 'integer',
@@ -230,7 +284,7 @@ protected function casts(): array
             'status' => 'integer',
             'rank' => 'integer',
             'size' => 'integer',
-            'matrix' => 'string',
+            'matrix' => 'array',
             'x' => 'integer',
             'y' => 'integer',
             'z' => 'integer',
@@ -242,21 +296,14 @@ protected function casts(): array
             'latitude' => 'float',
             'longitude' => 'float',
             'active' => 'boolean',
-            'canceled' => 'boolean',
-            'closed' => 'boolean',
-            'completed' => 'boolean',
-            'duplicate' => 'boolean',
-            'fixed' => 'boolean',
+            'cron' => 'boolean',
             'flagged' => 'boolean',
             'internal' => 'boolean',
             'locked' => 'boolean',
             'pending' => 'boolean',
             'planned' => 'boolean',
             'problem' => 'boolean',
-            'published' => 'boolean',
-            'released' => 'boolean',
             'retired' => 'boolean',
-            'resolved' => 'boolean',
             'suspended' => 'boolean',
             'unknown' => 'boolean',
             'label' => 'string',
@@ -273,6 +320,8 @@ protected function casts(): array
             'avatar' => 'string',
             'ui' => 'array',
             'assets' => 'array',
+            'backlog' => 'array',
+            'board' => 'array',
             'flow' => 'array',
             'meta' => 'array',
             'notes' => 'array',
@@ -282,6 +331,18 @@ protected function casts(): array
         ];
     }
 
+    /**
+     * The matrix of the flow.
+     */
+    public function matrix(): HasOne
+    {
+        return $this->hasOne(
+            Matrix::class,
+            'id',
+            'matrix_id'
+        );
+    }
+
     /**
      * The note of the flow.
      */
diff --git a/src/Models/Milestone.php b/src/Models/Milestone.php
index eacebe5..38e6f07 100644
--- a/src/Models/Milestone.php
+++ b/src/Models/Milestone.php
@@ -1,9 +1,9 @@
 <?php
-
-declare(strict_types=1);
 /**
  * Playground
  */
+
+declare(strict_types=1);
 namespace Playground\Matrix\Models;
 
 use Illuminate\Database\Eloquent\Relations\HasOne;
@@ -11,6 +11,108 @@
 
 /**
  * \Playground\Matrix\Models\Milestone
+ *
+ * @property string $id
+ * @property ?scalar $created_by_id
+ * @property ?scalar $modified_by_id
+ * @property ?scalar $owned_by_id
+ * @property ?string $parent_id
+ * @property ?string $milestone_type
+ * @property ?string $backlog_id
+ * @property ?string $board_id
+ * @property ?string $epic_id
+ * @property ?string $flow_id
+ * @property ?string $matrix_id
+ * @property ?string $note_id
+ * @property ?string $project_id
+ * @property ?string $release_id
+ * @property ?string $roadmap_id
+ * @property ?string $source_id
+ * @property ?string $sprint_id
+ * @property ?string $tag_id
+ * @property ?string $team_id
+ * @property ?string $ticket_id
+ * @property ?string $version_id
+ * @property ?Carbon $created_at
+ * @property ?Carbon $updated_at
+ * @property ?Carbon $deleted_at
+ * @property ?Carbon $start_at
+ * @property ?Carbon $planned_start_at
+ * @property ?Carbon $end_at
+ * @property ?Carbon $planned_end_at
+ * @property ?Carbon $canceled_at
+ * @property ?Carbon $closed_at
+ * @property ?Carbon $embargo_at
+ * @property ?Carbon $fixed_at
+ * @property ?Carbon $postponed_at
+ * @property ?Carbon $published_at
+ * @property ?Carbon $released_at
+ * @property ?Carbon $resolved_at
+ * @property ?Carbon $resumed_at
+ * @property ?Carbon $suspended_at
+ * @property int $gids
+ * @property int $po
+ * @property int $pg
+ * @property int $pw
+ * @property bool $only_admin
+ * @property bool $only_user
+ * @property bool $only_guest
+ * @property bool $allow_public
+ * @property int $status
+ * @property int $rank
+ * @property int $size
+ * @property ?array $matrix
+ * @property ?int $x
+ * @property ?int $y
+ * @property ?int $z
+ * @property ?double $r
+ * @property ?double $theta
+ * @property ?double $rho
+ * @property ?double $phi
+ * @property ?double $elevation
+ * @property ?double $latitude
+ * @property ?double $longitude
+ * @property bool $active
+ * @property bool $canceled
+ * @property bool $closed
+ * @property bool $completed
+ * @property bool $cron
+ * @property bool $duplicate
+ * @property bool $fixed
+ * @property bool $flagged
+ * @property bool $internal
+ * @property bool $locked
+ * @property bool $pending
+ * @property bool $planned
+ * @property bool $problem
+ * @property bool $published
+ * @property bool $released
+ * @property bool $retired
+ * @property bool $resolved
+ * @property bool $suspended
+ * @property bool $unknown
+ * @property string $label
+ * @property string $title
+ * @property string $byline
+ * @property ?string $slug
+ * @property string $url
+ * @property string $description
+ * @property string $introduction
+ * @property ?string $content
+ * @property ?string $summary
+ * @property string $icon
+ * @property string $image
+ * @property string $avatar
+ * @property ?array $ui
+ * @property ?array $assets
+ * @property ?array $backlog
+ * @property ?array $board
+ * @property ?array $flow
+ * @property ?array $meta
+ * @property ?array $notes
+ * @property ?array $options
+ * @property ?array $roadmap
+ * @property ?array $sources
  */
 class Milestone extends Model
 {
@@ -31,6 +133,7 @@ class Milestone extends Model
         'board_id' => null,
         'epic_id' => null,
         'flow_id' => null,
+        'matrix_id' => null,
         'note_id' => null,
         'project_id' => null,
         'release_id' => null,
@@ -51,11 +154,9 @@ class Milestone extends Model
         'canceled_at' => null,
         'closed_at' => null,
         'embargo_at' => null,
-        'fixed_at' => null,
         'postponed_at' => null,
         'published_at' => null,
         'released_at' => null,
-        'resolved_at' => null,
         'resumed_at' => null,
         'suspended_at' => null,
         'gids' => 0,
@@ -69,7 +170,7 @@ class Milestone extends Model
         'status' => 0,
         'rank' => 0,
         'size' => 0,
-        'matrix' => '',
+        'matrix' => '{}',
         'x' => null,
         'y' => null,
         'z' => null,
@@ -84,6 +185,7 @@ class Milestone extends Model
         'canceled' => false,
         'closed' => false,
         'completed' => false,
+        'cron' => false,
         'duplicate' => false,
         'fixed' => false,
         'flagged' => false,
@@ -135,6 +237,7 @@ class Milestone extends Model
         'board_id',
         'epic_id',
         'flow_id',
+        'matrix_id',
         'note_id',
         'project_id',
         'release_id',
@@ -152,12 +255,10 @@ class Milestone extends Model
         'canceled_at',
         'closed_at',
         'embargo_at',
-        'fixed_at',
         'postponed_at',
         'published_at',
         'released_at',
         'resumed_at',
-        'resolved_at',
         'suspended_at',
         'gids',
         'po',
@@ -185,6 +286,7 @@ class Milestone extends Model
         'canceled',
         'closed',
         'completed',
+        'cron',
         'duplicate',
         'fixed',
         'flagged',
@@ -217,7 +319,6 @@ class Milestone extends Model
         'board',
         'flow',
         'meta',
-        'notes',
         'options',
         'roadmap',
         'sources',
@@ -242,12 +343,10 @@ protected function casts(): array
             'canceled_at' => 'datetime',
             'closed_at' => 'datetime',
             'embargo_at' => 'datetime',
-            'fixed_at' => 'datetime',
             'postponed_at' => 'datetime',
             'published_at' => 'datetime',
             'released_at' => 'datetime',
             'resumed_at' => 'datetime',
-            'resolved_at' => 'datetime',
             'suspended_at' => 'datetime',
             'gids' => 'integer',
             'po' => 'integer',
@@ -260,7 +359,7 @@ protected function casts(): array
             'status' => 'integer',
             'rank' => 'integer',
             'size' => 'integer',
-            'matrix' => 'string',
+            'matrix' => 'array',
             'x' => 'integer',
             'y' => 'integer',
             'z' => 'integer',
@@ -275,6 +374,7 @@ protected function casts(): array
             'canceled' => 'boolean',
             'closed' => 'boolean',
             'completed' => 'boolean',
+            'cron' => 'boolean',
             'duplicate' => 'boolean',
             'fixed' => 'boolean',
             'flagged' => 'boolean',
@@ -362,6 +462,18 @@ public function flow(): HasOne
         );
     }
 
+    /**
+     * The matrix of the milestone.
+     */
+    public function matrix(): HasOne
+    {
+        return $this->hasOne(
+            Matrix::class,
+            'id',
+            'matrix_id'
+        );
+    }
+
     /**
      * The project of the milestone.
      */
diff --git a/tests/Feature/Models/Flow/ModelTest.php b/tests/Feature/Models/Flow/ModelTest.php
index f1ef2d3..cb56278 100644
--- a/tests/Feature/Models/Flow/ModelTest.php
+++ b/tests/Feature/Models/Flow/ModelTest.php
@@ -38,6 +38,11 @@ class ModelTest extends ModelCase
             'rule' => 'create',
             'modelClass' => \Playground\Matrix\Models\Flow::class,
         ],
+        'matrix' => [
+            'key' => 'matrix_id',
+            'rule' => 'create',
+            'modelClass' => \Playground\Matrix\Models\Matrix::class,
+        ],
         'note' => [
             'key' => 'note_id',
             'rule' => 'create',
diff --git a/tests/Feature/Models/Milestone/ModelTest.php b/tests/Feature/Models/Milestone/ModelTest.php
index c21d53c..65c9637 100644
--- a/tests/Feature/Models/Milestone/ModelTest.php
+++ b/tests/Feature/Models/Milestone/ModelTest.php
@@ -58,6 +58,11 @@ class ModelTest extends ModelCase
             'rule' => 'create',
             'modelClass' => \Playground\Matrix\Models\Flow::class,
         ],
+        'matrix' => [
+            'key' => 'matrix_id',
+            'rule' => 'create',
+            'modelClass' => \Playground\Matrix\Models\Matrix::class,
+        ],
         'project' => [
             'key' => 'project_id',
             'rule' => 'create',
diff --git a/tests/Unit/Models/Backlog/ModelTest.php b/tests/Unit/Models/Backlog/ModelTest.php
index 2b8ce28..dc7f0b5 100644
--- a/tests/Unit/Models/Backlog/ModelTest.php
+++ b/tests/Unit/Models/Backlog/ModelTest.php
@@ -17,6 +17,11 @@ class ModelTest extends ModelCase
 
     protected bool $hasRelationships = true;
 
+    protected array $hasMany = [
+        'sprints',
+        'tickets',
+    ];
+
     protected array $hasOne = [
         'creator',
         'modifier',
diff --git a/tests/Unit/Models/Flow/ModelTest.php b/tests/Unit/Models/Flow/ModelTest.php
index d6bdae8..1645a63 100644
--- a/tests/Unit/Models/Flow/ModelTest.php
+++ b/tests/Unit/Models/Flow/ModelTest.php
@@ -22,6 +22,7 @@ class ModelTest extends ModelCase
         'modifier',
         'owner',
         'parent',
+        'matrix',
         'note',
         'tag',
         'team',
diff --git a/tests/Unit/Models/Milestone/ModelTest.php b/tests/Unit/Models/Milestone/ModelTest.php
index d13a36a..8b608e5 100644
--- a/tests/Unit/Models/Milestone/ModelTest.php
+++ b/tests/Unit/Models/Milestone/ModelTest.php
@@ -26,6 +26,7 @@ class ModelTest extends ModelCase
         'board',
         'epic',
         'flow',
+        'matrix',
         'project',
         'release',
         'roadmap',
diff --git a/tests/Unit/Models/Ticket/ModelTest.php b/tests/Unit/Models/Ticket/ModelTest.php
index 5cf0dfc..72e033d 100644
--- a/tests/Unit/Models/Ticket/ModelTest.php
+++ b/tests/Unit/Models/Ticket/ModelTest.php
@@ -26,6 +26,7 @@ class ModelTest extends ModelCase
         'board',
         'completedBy',
         'epic',
+        'fixedBy',
         'flow',
         'matrix',
         'milestone',