fix(database): check explicit relation attributes before singularizing property names

getBelongsTo(), getHasOne(), and getHasOneThrough() singularized the
property name before checking for explicit relation attributes. This
broke any property whose last word is a Latin plural (metadata, data,
criteria, media) because singularization produced a non-existent name
(e.g. product_metadata → product_metadatum) and the method returned
null without ever checking the original property.

Now each method checks if the original property has an explicit
attribute before recursing with the singularized name.

Author: laylatichy

packages/database/src/Builder/ModelInspector.php

@@ -196,7 +196,7 @@ public function getBelongsTo(string $name): ?BelongsTo
 
             $singularizedName = $name->singularizeLastWord();
 
-            if (! $singularizedName->equals($name)) {
+            if (! $singularizedName->equals($name) && $this->reflector->hasProperty($singularizedName)) {
                 return $this->getBelongsTo($singularizedName);
             }
 
@@ -264,7 +264,7 @@ public function getHasOne(string $name): ?HasOne
 
             $singularizedName = $name->singularizeLastWord();
 
-            if (! $singularizedName->equals($name)) {
+            if (! $singularizedName->equals($name) && $this->reflector->hasProperty($singularizedName)) {
                 return $this->getHasOne($singularizedName);
             }
 
@@ -343,7 +343,7 @@ public function getHasOneThrough(string $name): ?HasOneThrough
 
             $singularizedName = $name->singularizeLastWord();
 
-            if (! $singularizedName->equals($name)) {
+            if (! $singularizedName->equals($name) && $this->reflector->hasProperty($singularizedName)) {
                 return $this->getHasOneThrough($singularizedName);
             }
 

packages/intl/src/Pluralizer/InflectorPluralizer.php

@@ -70,7 +70,7 @@ private function extractLastWord(string $value, ?string &$prefix = null, ?string
             ? array_pop(array: $parts)
             : '';
 
-        if (count(value: $parts) === 0) {
+        if ($parts === []) {
             return null;
         }
 

tests/Integration/Database/ModelInspector/LatinPluralRelationTest.php

@@ -0,0 +1,127 @@
+<?php
+
+namespace Tests\Tempest\Integration\Database\ModelInspector;
+
+use PHPUnit\Framework\Attributes\Test;
+use Tempest\Database\BelongsTo;
+use Tempest\Database\Config\DatabaseDialect;
+use Tempest\Database\HasOne;
+use Tempest\Database\HasOneThrough;
+use Tempest\Database\PrimaryKey;
+use Tempest\Database\Table;
+use Tests\Tempest\Integration\FrameworkIntegrationTestCase;
+
+use function Tempest\Database\inspect;
+
+final class LatinPluralRelationTest extends FrameworkIntegrationTestCase
+{
+    #[Test]
+    public function belongs_to_with_latin_plural_property_name(): void
+    {
+        $model = inspect(model: LatinPluralProductModel::class);
+        $relation = $model->getRelation(name: 'product_metadata');
+
+        $this->assertInstanceOf(
+            expected: BelongsTo::class,
+            actual: $relation,
+        );
+
+        $this->assertSame(
+            expected: 'LEFT JOIN metadata ON metadata.id = products.metadata_id',
+            actual: $relation
+                ->getJoinStatement()
+                ->compile(dialect: DatabaseDialect::SQLITE),
+        );
+    }
+
+    #[Test]
+    public function has_one_with_latin_plural_property_name(): void
+    {
+        $model = inspect(model: LatinPluralMetadataModel::class);
+        $relation = $model->getRelation(name: 'extra_data');
+
+        $this->assertInstanceOf(
+            expected: HasOne::class,
+            actual: $relation,
+        );
+    }
+
+    #[Test]
+    public function has_one_through_with_latin_plural_property_name(): void
+    {
+        $model = inspect(model: LatinPluralMetadataModel::class);
+        $relation = $model->getRelation(name: 'product_criteria');
+
+        $this->assertInstanceOf(
+            expected: HasOneThrough::class,
+            actual: $relation,
+        );
+    }
+
+    #[Test]
+    public function latin_plural_belongs_to_uses_fk_in_select_fields(): void
+    {
+        $model = inspect(model: LatinPluralProductModel::class);
+        $fields = $model->getSelectFields()->toArray();
+
+        $this->assertContains(
+            needle: 'metadata_id',
+            haystack: $fields,
+        );
+        $this->assertNotContains(
+            needle: 'product_metadata',
+            haystack: $fields,
+        );
+    }
+}
+
+#[Table(name: 'products')]
+final class LatinPluralProductModel
+{
+    public PrimaryKey $id;
+
+    #[BelongsTo]
+    public ?LatinPluralMetadataModel $product_metadata = null;
+
+    public string $name;
+}
+
+#[Table(name: 'metadata')]
+final class LatinPluralMetadataModel
+{
+    public PrimaryKey $id;
+
+    public string $value;
+
+    #[HasOne]
+    public ?LatinPluralExtraDataModel $extra_data = null;
+
+    #[HasOneThrough(through: LatinPluralIntermediateModel::class)]
+    public ?LatinPluralCriteriaModel $product_criteria = null;
+}
+
+#[Table(name: 'extra_data')]
+final class LatinPluralExtraDataModel
+{
+    public PrimaryKey $id;
+
+    public string $info;
+}
+
+#[Table(name: 'intermediate')]
+final class LatinPluralIntermediateModel
+{
+    public PrimaryKey $id;
+
+    public LatinPluralMetadataModel $metadata;
+
+    public string $link;
+}
+
+#[Table(name: 'criteria')]
+final class LatinPluralCriteriaModel
+{
+    public PrimaryKey $id;
+
+    public string $label;
+}