diff --git a/migrations/Version20250526164743.php b/migrations/Version20250526164743.php
new file mode 100644
index 0000000..9a69b91
--- /dev/null
+++ b/migrations/Version20250526164743.php
@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+/**
+ * Auto-generated Migration: Please modify to your needs!
+ */
+final class Version20250526164743 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return '';
+    }
+
+    public function up(Schema $schema): void
+    {
+        // this up() migration is auto-generated, please modify it to your needs
+        $this->addSql(<<<'SQL'
+            CREATE TABLE task (id INT AUTO_INCREMENT NOT NULL, user_id INT NOT NULL, produced_material_id INT NOT NULL, recipe_id INT DEFAULT NULL, parent_task_id INT DEFAULT NULL, root_task_id INT DEFAULT NULL, machine_extra_info1 VARCHAR(255) DEFAULT NULL, machine_extra_info2 VARCHAR(255) DEFAULT NULL, quantity_to_produce INT NOT NULL, quantity_provided_at_start INT NOT NULL, INDEX IDX_527EDB25A76ED395 (user_id), INDEX IDX_527EDB252B1CB36C (produced_material_id), INDEX IDX_527EDB2559D8A214 (recipe_id), INDEX IDX_527EDB25FFFE75C0 (parent_task_id), INDEX IDX_527EDB2561F7494C (root_task_id), PRIMARY KEY(id)) DEFAULT CHARACTER SET utf8mb4 COLLATE `utf8mb4_unicode_ci` ENGINE = InnoDB
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task ADD CONSTRAINT FK_527EDB25A76ED395 FOREIGN KEY (user_id) REFERENCES user (id) ON DELETE CASCADE
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task ADD CONSTRAINT FK_527EDB252B1CB36C FOREIGN KEY (produced_material_id) REFERENCES material (id) ON DELETE CASCADE
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task ADD CONSTRAINT FK_527EDB2559D8A214 FOREIGN KEY (recipe_id) REFERENCES recipe (id) ON DELETE CASCADE
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task ADD CONSTRAINT FK_527EDB25FFFE75C0 FOREIGN KEY (parent_task_id) REFERENCES task (id) ON DELETE CASCADE
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task ADD CONSTRAINT FK_527EDB2561F7494C FOREIGN KEY (root_task_id) REFERENCES task (id) ON DELETE CASCADE
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE material_type ADD stack_name VARCHAR(50) NOT NULL
+        SQL);
+    }
+
+    public function down(Schema $schema): void
+    {
+        // this down() migration is auto-generated, please modify it to your needs
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task DROP FOREIGN KEY FK_527EDB25A76ED395
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task DROP FOREIGN KEY FK_527EDB252B1CB36C
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task DROP FOREIGN KEY FK_527EDB2559D8A214
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task DROP FOREIGN KEY FK_527EDB25FFFE75C0
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE task DROP FOREIGN KEY FK_527EDB2561F7494C
+        SQL);
+        $this->addSql(<<<'SQL'
+            DROP TABLE task
+        SQL);
+        $this->addSql(<<<'SQL'
+            ALTER TABLE material_type DROP stack_name
+        SQL);
+    }
+}
diff --git a/src/Entity/InputRecipeMaterial.php b/src/Entity/InputRecipeMaterial.php
index 221e44a..0d5aa76 100644
--- a/src/Entity/InputRecipeMaterial.php
+++ b/src/Entity/InputRecipeMaterial.php
@@ -5,6 +5,7 @@ namespace App\Entity;
 use App\Repository\InputRecipeMaterialRepository;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A material consumed by a recipe
@@ -19,18 +20,25 @@ class InputRecipeMaterial {
      */
     #[ORM\ManyToOne(inversedBy: 'inputMaterials')]
     #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Assert\NotNull(message: 'Veuillez sélectionner une recette')]
+    #[Assert\Valid]
     private ?Recipe $recipe = null;
     /**
      * @var Material|null The material
      */
     #[ORM\ManyToOne]
     #[ORM\JoinColumn(nullable: false)]
+    #[Assert\NotNull(message: 'Veuillez sélectionner un matériau')]
+    #[Assert\Valid]
     private ?Material $material = null;
 
     /**
      * @var int|null The consumed quantity
      */
     #[ORM\Column]
+    #[Assert\Type(type: 'integer', message: 'La quantité consommée doit être un nombre entier')]
+    #[Assert\NotNull(message: 'Veuillez saisir une quantité consommée')]
+    #[Assert\Positive(message: 'La quantité consommée doit être strictement positive')]
     private ?int $consumedQuantity = null;
 
     /**
diff --git a/src/Entity/Machine.php b/src/Entity/Machine.php
index 0895b2c..c95c17f 100644
--- a/src/Entity/Machine.php
+++ b/src/Entity/Machine.php
@@ -7,6 +7,7 @@ use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A machine
@@ -21,19 +22,25 @@ class Machine {
      * @var string|null The label for the first extra information
      */
     #[ORM\Column(length: 255, nullable: true)]
+    #[Assert\NotBlank(message: 'Veuillez saisir un nom d\'information complémentaire n° 1', allowNull: true)]
     private ?string $labelExtraInfo1 = null;
     /**
      * @var string|null The label for the second extra information
      */
     #[ORM\Column(length: 255, nullable: true)]
+    #[Assert\NotBlank(message: 'Veuillez saisir un nom d\'information complémentaire n° 2', allowNull: true)]
     private ?string $labelExtraInfo2 = null;
 
     /**
      * @var Collection<int, Recipe> The recipes
      */
     #[ORM\OneToMany(targetEntity: Recipe::class, mappedBy: 'machine', orphanRemoval: true)]
+    #[Assert\Valid]
     private Collection $recipes;
 
+    /**
+     * Initialization
+     */
     public function __construct () {
         $this->recipes = new ArrayCollection();
     }
diff --git a/src/Entity/Material.php b/src/Entity/Material.php
index fe5afcd..fa7a832 100644
--- a/src/Entity/Material.php
+++ b/src/Entity/Material.php
@@ -7,6 +7,7 @@ use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A material
@@ -22,18 +23,23 @@ class Material {
      */
     #[ORM\ManyToOne]
     #[ORM\JoinColumn(nullable: false)]
+    #[Assert\NotNull(message: 'Veuillez sélectionner un type de matériau')]
+    #[Assert\Valid]
     private ?MaterialType $type = null;
 
     /**
      * @var bool|null Is the material craftable by default?
      */
     #[ORM\Column]
+    #[Assert\Type(type: 'bool', message: 'L\'indicateur de si le matériau est craftable par défaut doit être un booléen')]
+    #[Assert\NotNull(message: 'Veuillez indiquer si le matériau est craftable par défaut')]
     private ?bool $isCraftableByDefault = null;
 
     /**
      * @var Collection<int, OutputRecipeMaterial> The recipes
      */
     #[ORM\OneToMany(targetEntity: OutputRecipeMaterial::class, mappedBy: 'material', orphanRemoval: true)]
+    #[Assert\Valid]
     private Collection $recipes;
 
     /**
diff --git a/src/Entity/MaterialType.php b/src/Entity/MaterialType.php
index 1b4a656..9337525 100644
--- a/src/Entity/MaterialType.php
+++ b/src/Entity/MaterialType.php
@@ -5,6 +5,7 @@ namespace App\Entity;
 use App\Repository\MaterialTypeRepository;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A material type
@@ -16,23 +17,53 @@ class MaterialType {
     use TNamedEntity;
 
     /**
-     * @var int|null The stack size
+     * @var string|null The “stack” name
+     */
+    #[ORM\Column(length: 50)]
+    #[Assert\NotBlank(message: 'Veuillez saisir un nom de pile')]
+    private ?string $stackName = null;
+    /**
+     * @var int|null The “stack” size
      */
     #[ORM\Column]
+    #[Assert\Type(type: 'integer', message: 'La taille de pile doit être un nombre entier')]
+    #[Assert\NotNull(message: 'Veuillez saisir une taille de pile')]
+    #[Assert\Positive(message: 'La taille de pile doit être strictement positive')]
     private ?int $stackSize = null;
 
     /**
-     * The stack size
+     * The “stack” name
+     *
+     * @return string|null The “stack” name
+     */
+    public function getStackName (): ?string {
+        return $this->stackName;
+    }
+    /**
+     * Set the “stack” name
+     *
+     * @param string $stackName The “stack” name
+     *
+     * @return $this
+     */
+    public function setStackName (string $stackName): static {
+        $this->stackName = $stackName;
+
+        return $this;
+    }
+
+    /**
+     * The “stack” size
      *
-     * @return int|null The stack size
+     * @return int|null The “stack” size
      */
     public function getStackSize (): ?int {
         return $this->stackSize;
     }
     /**
-     * Set the stack size
+     * Set the “stack” size
      *
-     * @param int $stackSize The stack size
+     * @param int $stackSize The “stack” size
      *
      * @return $this
      */
diff --git a/src/Entity/OutputRecipeMaterial.php b/src/Entity/OutputRecipeMaterial.php
index e8fd704..8b4dc8a 100644
--- a/src/Entity/OutputRecipeMaterial.php
+++ b/src/Entity/OutputRecipeMaterial.php
@@ -5,6 +5,7 @@ namespace App\Entity;
 use App\Repository\OutputRecipeMaterialRepository;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A material produced by a recipe
@@ -19,18 +20,25 @@ class OutputRecipeMaterial {
      */
     #[ORM\ManyToOne(inversedBy: 'outputMaterials')]
     #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Assert\NotNull(message: 'Veuillez sélectionner une recette')]
+    #[Assert\Valid]
     private ?Recipe $recipe = null;
     /**
      * @var Material|null The material
      */
     #[ORM\ManyToOne(inversedBy: 'recipes')]
     #[ORM\JoinColumn(nullable: false)]
+    #[Assert\NotNull(message: 'Veuillez sélectionner un matériau')]
+    #[Assert\Valid]
     private ?Material $material = null;
 
     /**
      * @var float|null The produced quantity
      */
     #[ORM\Column]
+    #[Assert\Type(type: 'float', message: 'La quantité produite doit être un nombre réel')]
+    #[Assert\NotNull(message: 'Veuillez saisir une quantité produite')]
+    #[Assert\Positive(message: 'La quantité produite doit être strictement positive')]
     private ?float $producedQuantity = null;
 
     /**
diff --git a/src/Entity/Recipe.php b/src/Entity/Recipe.php
index 2c9d974..f91715c 100644
--- a/src/Entity/Recipe.php
+++ b/src/Entity/Recipe.php
@@ -6,6 +6,7 @@ use App\Repository\RecipeRepository;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * A crafting recipe
@@ -20,30 +21,39 @@ class Recipe {
      */
     #[ORM\ManyToOne(inversedBy: 'recipes')]
     #[ORM\JoinColumn(nullable: false)]
+    #[Assert\NotNull(message: 'Veuillez sélectionner une machine de fabrication')]
+    #[Assert\Valid]
     private ?Machine $machine = null;
     /**
      * @var float|null The crafting time, in seconds
      */
     #[ORM\Column]
+    #[Assert\Type(type: 'float', message: 'Le temps de production doit être un nombre réel')]
+    #[Assert\NotNull(message: 'Veuillez saisir un temps de production')]
+    #[Assert\Positive(message: 'Le temps de production doit être strictement positive')]
     private ?float $craftingTime = null;
 
     /**
-     * @var Collection<int, InputRecipeMaterial> The input materials
+     * @var Collection<int, InputRecipeMaterial> The consumed materials
      */
     #[ORM\OneToMany(targetEntity: InputRecipeMaterial::class, mappedBy: 'recipe', orphanRemoval: true)]
-    private Collection $inputMaterials;
+    #[Assert\Count(min: 1, minMessage: 'Veuillez ajouter au moins un matériau consommé')]
+    #[Assert\Valid]
+    private Collection $consumedMaterials;
     /**
-     * @var Collection<int, OutputRecipeMaterial> The output materials
+     * @var Collection<int, OutputRecipeMaterial> The produced materials
      */
     #[ORM\OneToMany(targetEntity: OutputRecipeMaterial::class, mappedBy: 'recipe', orphanRemoval: true)]
-    private Collection $outputMaterials;
+    #[Assert\Count(min: 1, minMessage: 'Veuillez ajouter au moins un matériau produit')]
+    #[Assert\Valid]
+    private Collection $producedMaterials;
 
     /**
      * Initialization
      */
     public function __construct () {
-        $this->inputMaterials = new ArrayCollection();
-        $this->outputMaterials = new ArrayCollection();
+        $this->consumedMaterials = new ArrayCollection();
+        $this->producedMaterials = new ArrayCollection();
     }
 
     /**
@@ -89,37 +99,37 @@ class Recipe {
     }
 
     /**
-     * The input materials
+     * The consumed materials
      *
-     * @return Collection<int, InputRecipeMaterial> The input materials
+     * @return Collection<int, InputRecipeMaterial> The consumed materials
      */
-    public function getInputMaterials (): Collection {
-        return $this->inputMaterials;
+    public function getConsumedMaterials (): Collection {
+        return $this->consumedMaterials;
     }
     /**
-     * Add an input material
+     * Add a consumed material
      *
-     * @param InputRecipeMaterial $inputMaterial The input material
+     * @param InputRecipeMaterial $inputMaterial The consumed material
      *
      * @return $this
      */
-    public function addInputMaterial (InputRecipeMaterial $inputMaterial): static {
-        if (!$this->inputMaterials->contains($inputMaterial)) {
-            $this->inputMaterials->add($inputMaterial);
+    public function addConsumedMaterial (InputRecipeMaterial $inputMaterial): static {
+        if (!$this->consumedMaterials->contains($inputMaterial)) {
+            $this->consumedMaterials->add($inputMaterial);
             $inputMaterial->setRecipe($this);
         }
 
         return $this;
     }
     /**
-     * Remove an input material
+     * Remove a consumed material
      *
-     * @param InputRecipeMaterial $inputMaterial The input material
+     * @param InputRecipeMaterial $inputMaterial The consumed material
      *
      * @return $this
      */
-    public function removeInputMaterial (InputRecipeMaterial $inputMaterial): static {
-        if ($this->inputMaterials->removeElement($inputMaterial)) {
+    public function removeConsumedMaterial (InputRecipeMaterial $inputMaterial): static {
+        if ($this->consumedMaterials->removeElement($inputMaterial)) {
             // set the owning side to null (unless already changed)
             if ($inputMaterial->getRecipe() === $this) {
                 $inputMaterial->setRecipe(null);
@@ -130,40 +140,40 @@ class Recipe {
     }
 
     /**
-     * The output materials
+     * The produced materials
      *
-     * @return Collection<int, OutputRecipeMaterial> The output materials
+     * @return Collection<int, OutputRecipeMaterial> The produced materials
      */
-    public function getOutputMaterials(): Collection
+    public function getProducedMaterials(): Collection
     {
-        return $this->outputMaterials;
+        return $this->producedMaterials;
     }
     /**
-     * Add an output material
+     * Add a produced material
      *
-     * @param OutputRecipeMaterial $outputMaterial The output material
+     * @param OutputRecipeMaterial $outputMaterial The produced material
      *
      * @return $this
      */
-    public function addOutputMaterial(OutputRecipeMaterial $outputMaterial): static
+    public function addProducedMaterial(OutputRecipeMaterial $outputMaterial): static
     {
-        if (!$this->outputMaterials->contains($outputMaterial)) {
-            $this->outputMaterials->add($outputMaterial);
+        if (!$this->producedMaterials->contains($outputMaterial)) {
+            $this->producedMaterials->add($outputMaterial);
             $outputMaterial->setRecipe($this);
         }
 
         return $this;
     }
     /**
-     * Remove an output material
+     * Remove a produced material
      *
-     * @param OutputRecipeMaterial $outputMaterial The output material
+     * @param OutputRecipeMaterial $outputMaterial The produced material
      *
      * @return $this
      */
-    public function removeOutputMaterial(OutputRecipeMaterial $outputMaterial): static
+    public function removeProducedMaterial(OutputRecipeMaterial $outputMaterial): static
     {
-        if ($this->outputMaterials->removeElement($outputMaterial)) {
+        if ($this->producedMaterials->removeElement($outputMaterial)) {
             // set the owning side to null (unless already changed)
             if ($outputMaterial->getRecipe() === $this) {
                 $outputMaterial->setRecipe(null);
diff --git a/src/Entity/TNamedEntity.php b/src/Entity/TNamedEntity.php
index d95594b..bf4335f 100644
--- a/src/Entity/TNamedEntity.php
+++ b/src/Entity/TNamedEntity.php
@@ -3,7 +3,7 @@
 namespace App\Entity;
 
 use Doctrine\ORM\Mapping as ORM;
-use JsonSerializable;
+use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * Implementation for an entity with a name
@@ -13,6 +13,7 @@ trait TNamedEntity {
      * @var string|null The name
      */
     #[ORM\Column(length: 50)]
+    #[Assert\NotBlank(message: 'Veuillez saisir un email')]
     private ?string $name = null;
 
     /**
diff --git a/src/Entity/Task.php b/src/Entity/Task.php
new file mode 100644
index 0000000..cb7d864
--- /dev/null
+++ b/src/Entity/Task.php
@@ -0,0 +1,287 @@
+<?php
+
+namespace App\Entity;
+
+use App\Repository\TaskRepository;
+use Doctrine\Common\Collections\ArrayCollection;
+use Doctrine\Common\Collections\Collection;
+use Doctrine\ORM\Mapping as ORM;
+use Symfony\Component\Validator\Constraints as Assert;
+
+/**
+ * A crafting task
+ */
+#[ORM\Entity(repositoryClass: TaskRepository::class)]
+class Task {
+    use TBaseEntity;
+
+    /**
+     * @var User|null The user
+     */
+    #[ORM\ManyToOne]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Assert\NotNull(message: 'Veuillez sélectionner un utilisateur')]
+    #[Assert\Valid]
+    private ?User $user = null;
+    /**
+     * @var Material|null The produced material
+     */
+    #[ORM\ManyToOne]
+    #[ORM\JoinColumn(nullable: false, onDelete: 'CASCADE')]
+    #[Assert\NotNull(message: 'Veuillez sélectionner le matériau à produire')]
+    #[Assert\Valid]
+    private ?Material $producedMaterial = null;
+    /**
+     * @var Recipe|null The recipe
+     */
+    #[ORM\ManyToOne]
+    #[ORM\JoinColumn(onDelete: 'CASCADE')]
+    #[Assert\Valid]
+    private ?Recipe $recipe = null;
+
+    /**
+     * @var string|null The label for the first extra information
+     */
+    #[ORM\Column(length: 255, nullable: true)]
+    #[Assert\NotBlank(message: 'Veuillez saisir l\'information complémentaire n° 1', allowNull: true)]
+    private ?string $machineExtraInfo1 = null;
+    /**
+     * @var string|null The label for the second extra information
+     */
+    #[ORM\Column(length: 255, nullable: true)]
+    #[Assert\NotBlank(message: 'Veuillez saisir l\'information complémentaire n° 2', allowNull: true)]
+    private ?string $machineExtraInfo2 = null;
+
+    /**
+     * @var int|null The quantity asked / to produce
+     */
+    #[ORM\Column]
+    #[Assert\Type(type: 'integer', message: 'La quantité à produire doit être un nombre entier')]
+    #[Assert\NotNull(message: 'Veuillez saisir une quantité à produire')]
+    #[Assert\Positive(message: 'La quantité à produire doit être strictement positive')]
+    private ?int $quantityToProduce = null;
+    /**
+     * @var int|null The quantity already provided at the start
+     */
+    #[ORM\Column]
+    #[Assert\Type(type: 'integer', message: 'La quantité de départ doit être un nombre entier')]
+    #[Assert\NotNull(message: 'Veuillez saisir une quantité de départ')]
+    #[Assert\PositiveOrZero(message: 'La quantité de départ doit être positive ou nulle')]
+    private ?int $quantityProvidedAtStart = null;
+
+    /**
+     * @var Task|null The parent task
+     */
+    #[ORM\ManyToOne(targetEntity: self::class, inversedBy: 'childTasks')]
+    #[ORM\JoinColumn(onDelete: 'CASCADE')]
+    #[Assert\Valid]
+    private ?self $parentTask = null;
+    /**
+     * @var Collection<int, self> The child tasks
+     */
+    #[ORM\OneToMany(targetEntity: self::class, mappedBy: 'parentTask', orphanRemoval: true)]
+    #[Assert\Valid]
+    private Collection $childTasks;
+    /**
+     * @var Task|null The root task
+     */
+    #[ORM\ManyToOne(targetEntity: self::class)]
+    #[ORM\JoinColumn(onDelete: 'CASCADE')]
+    #[Assert\Valid]
+    private ?self $rootTask = null;
+
+    /**
+     * Initialization
+     */
+    public function __construct () {
+        $this->childTasks = new ArrayCollection();
+    }
+
+    /**
+     * The user
+     *
+     * @return User|null The user
+     */
+    public function getUser (): ?User {
+        return $this->user;
+    }
+    /**
+     * Set the user
+     *
+     * @param User|null $user The user
+     *
+     * @return $this
+     */
+    public function setUser (?User $user): static {
+        $this->user = $user;
+
+        return $this;
+    }
+
+    /**
+     * The produced material
+     *
+     * @return Material|null The produced material
+     */
+    public function getProducedMaterial (): ?Material {
+        return $this->producedMaterial;
+    }
+    /**
+     * Set the produced material
+     *
+     * @param Material|null $producedMaterial The produced material
+     *
+     * @return $this
+     */
+    public function setProducedMaterial (?Material $producedMaterial): static {
+        $this->producedMaterial = $producedMaterial;
+
+        return $this;
+    }
+
+    /**
+     * The recipe
+     *
+     * @return Recipe|null The recipe
+     */
+    public function getRecipe (): ?Recipe {
+        return $this->recipe;
+    }
+    /**
+     * The recipe
+     *
+     * @param Recipe|null $recipe The recipe
+     *
+     * @return $this
+     */
+    public function setRecipe (?Recipe $recipe): static {
+        $this->recipe = $recipe;
+
+        return $this;
+    }
+
+    /**
+     * The quantity asked / to produce
+     *
+     * @return int|null The quantity asked / to produce
+     */
+    public function getQuantityToProduce (): ?int {
+        return $this->quantityToProduce;
+    }
+    /**
+     * Set the quantity asked / to produce
+     *
+     * @param int $quantityToProduce The quantity asked / to produce
+     *
+     * @return $this
+     */
+    public function setQuantityToProduce (int $quantityToProduce): static {
+        $this->quantityToProduce = $quantityToProduce;
+
+        return $this;
+    }
+
+    /**
+     * The quantity already provided at the start
+     *
+     * @return int|null The quantity already provided at the start
+     */
+    public function getQuantityProvidedAtStart (): ?int {
+        return $this->quantityProvidedAtStart;
+    }
+    /**
+     * Set the quantity already provided at the start
+     *
+     * @param int $quantityProvidedAtStart The quantity already provided at the start
+     *
+     * @return $this
+     */
+    public function setQuantityProvidedAtStart (int $quantityProvidedAtStart): static {
+        $this->quantityProvidedAtStart = $quantityProvidedAtStart;
+
+        return $this;
+    }
+
+    /**
+     * The parent task
+     *
+     * @return self|null The parent task
+     */
+    public function getParentTask (): ?self {
+        return $this->parentTask;
+    }
+    /**
+     * Set the parent task
+     *
+     * @param Task|null $parentTask The parent task
+     *
+     * @return $this
+     */
+    public function setParentTask (?self $parentTask): static {
+        $this->parentTask = $parentTask;
+
+        return $this;
+    }
+
+    /**
+     * The child tasks
+     *
+     * @return Collection<int, self> The child tasks
+     */
+    public function getChildTasks (): Collection {
+        return $this->childTasks;
+    }
+    /**
+     * Add a child task
+     *
+     * @param Task $childTask The child task
+     *
+     * @return $this
+     */
+    public function addChildTask (self $childTask): static {
+        if (!$this->childTasks->contains($childTask)) {
+            $this->childTasks->add($childTask);
+            $childTask->setParentTask($this);
+        }
+
+        return $this;
+    }
+    /**
+     * Remove a child task
+     *
+     * @param Task $childTask The child task
+     *
+     * @return $this
+     */
+    public function removeChildTask (self $childTask): static {
+        if ($this->childTasks->removeElement($childTask)) {
+            // set the owning side to null (unless already changed)
+            if ($childTask->getParentTask() === $this) {
+                $childTask->setParentTask(null);
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * The root task
+     *
+     * @return self|null The root task
+     */
+    public function getRootTask (): ?self {
+        return $this->rootTask;
+    }
+    /**
+     * Set the root task
+     *
+     * @param Task|null $rootTask The root task
+     *
+     * @return $this
+     */
+    public function setRootTask (?self $rootTask): static {
+        $this->rootTask = $rootTask;
+
+        return $this;
+    }
+}
diff --git a/src/Entity/User.php b/src/Entity/User.php
index 3f0513f..280135f 100644
--- a/src/Entity/User.php
+++ b/src/Entity/User.php
@@ -3,10 +3,6 @@
 namespace App\Entity;
 
 use App\Repository\UserRepository;
-use DateTimeImmutable;
-use Doctrine\Common\Collections\ArrayCollection;
-use Doctrine\Common\Collections\Collection;
-use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
 use Stringable;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
@@ -39,6 +35,7 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface, Stringa
      * @var string|null The name
      */
     #[ORM\Column(length: 100, nullable: true)]
+    #[Assert\NotBlank(message: 'Veuillez saisir un nom', allowNull: true)]
     private ?string $name = null;
 
     /**
diff --git a/src/Repository/TaskRepository.php b/src/Repository/TaskRepository.php
new file mode 100644
index 0000000..97061ee
--- /dev/null
+++ b/src/Repository/TaskRepository.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Repository;
+
+use App\Entity\Task;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<Task>
+ */
+class TaskRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, Task::class);
+    }
+
+    //    /**
+    //     * @return Task[] Returns an array of Task objects
+    //     */
+    //    public function findByExampleField($value): array
+    //    {
+    //        return $this->createQueryBuilder('t')
+    //            ->andWhere('t.exampleField = :val')
+    //            ->setParameter('val', $value)
+    //            ->orderBy('t.id', 'ASC')
+    //            ->setMaxResults(10)
+    //            ->getQuery()
+    //            ->getResult()
+    //        ;
+    //    }
+
+    //    public function findOneBySomeField($value): ?Task
+    //    {
+    //        return $this->createQueryBuilder('t')
+    //            ->andWhere('t.exampleField = :val')
+    //            ->setParameter('val', $value)
+    //            ->getQuery()
+    //            ->getOneOrNullResult()
+    //        ;
+    //    }
+}