diff --git a/src/Alias/Model/Repository.php b/src/Alias/Model/Repository.php
index 412ff37..ae24b4a 100644
--- a/src/Alias/Model/Repository.php
+++ b/src/Alias/Model/Repository.php
@@ -1,11 +1,13 @@
 <?php
 namespace ProVM\Alias\Model;
 
+use PDOException;
 use ProVM\Concept\Database\Connection;
 use ProVM\Concept\Database\QueryBuilder;
 use ProVM\Concept\Model;
 use ProVM\Concept\Model\Factory;
 use ProVM\Concept\Model\Repository as RepositoryInterface;
+use ProVM\Exception\BlankResult;
 
 abstract class Repository implements RepositoryInterface
 {
@@ -22,10 +24,6 @@ abstract class Repository implements RepositoryInterface
     protected Factory $factory;
     protected string $model;
     protected string $table;
-    protected array $columns;
-    protected array $required_columns;
-    protected array $optional_columns;
-    protected array $properties;
 
     public function getConnection(): Connection
     {
@@ -47,28 +45,6 @@ abstract class Repository implements RepositoryInterface
     {
         return $this->table;
     }
-    public function getColumns(): array
-    {
-        return $this->columns ?? array_merge($this->getRequiredColumns(), $this->getOptionalColumns());
-    }
-    public function getRequiredColumns(): array
-    {
-        if (isset($this->optional_columns) and !isset($this->required_columns)) {
-            return array_diff($this->getColumns(), $this->getOptionalColumns());
-        }
-        return $this->required_columns ?? $this->getColumns();
-    }
-    public function getOptionalColumns(): array
-    {
-        if (isset($this->required_columns) and !isset($this->optional_columns)) {
-            return array_diff($this->getColumns(), $this->getRequiredColumns());
-        }
-        return $this->optional_columns ?? [];
-    }
-    public function getProperties(): array
-    {
-        return $this->properties ?? $this->getColumns();
-    }
 
     public function setConnection(Connection $connection): Repository
     {
@@ -95,229 +71,113 @@ abstract class Repository implements RepositoryInterface
         $this->table = $table;
         return $this;
     }
-    public function setColumns(array $columns): RepositoryInterface
-    {
-        foreach ($columns as $column) {
-            $this->addColumn($column);
-        }
-        return $this;
-    }
-    public function setRequiredColumns(array $columns): RepositoryInterface
-    {
-        foreach ($columns as $item) {
-            $this->addRequiredColumn($item);
-        }
-        return $this;
-    }
-    public function setOptionalColumns(array $columns): RepositoryInterface
-    {
-        foreach ($columns as $item) {
-            $this->addOptionalColumn($item);
-        }
-        return $this;
-    }
-    public function setProperties(array $properties): RepositoryInterface
-    {
-        foreach ($properties as $property) {
-            $this->addProperty($property);
-        }
-        return $this;
-    }
 
-    public function addColumn(string $column): RepositoryInterface
-    {
-        $this->columns []= $column;
-        return $this;
-    }
-    public function addRequiredColumn(string $column): RepositoryInterface
-    {
-        $this->required_columns []= $column;
-        return $this;
-    }
-    public function addOptionalColumn(string $column): RepositoryInterface
-    {
-        $this->optional_columns []= $column;
-        return $this;
-    }
-    public function addProperty(string $property): RepositoryInterface
-    {
-        $this->properties []= $property;
-        return $this;
-    }
-
-    public function getNewModel(): Model
-    {
-        $class = $this->getModel();
-        return (new $class())
-            ->setRepository($this);
-    }
-    public function getMethod(string $property, bool $get = true): string
-    {
-        $m = str_replace(' ', '', ucwords(str_replace('_', ' ', $property)));
-        if ($get) {
-            return "get{$m}";
-        }
-        return "set{$m}";
-    }
-    public function getProperty(string $method): string
-    {
-        $parts = preg_split('/(?=[A-Z])/', $method);
-        if (in_array(strtolower($parts[0]), ['get', 'set'])) {
-            array_shift($parts);
-        }
-        return strtolower(implode('_', $parts));
-    }
-
-    protected function compareProp(string $property, ?array $data = null): bool
-    {
-        if ($data === null) {
-            return in_array($property, $this->getRequiredColumns());
-        }
-        return in_array($property, $this->getOptionalColumns()) and key_exists($property, $data);
-    }
-    protected function compareProperty(string $property, ?array $data = null, ?string &$tmp_property = null): bool
-    {
-        $tmp_property = $property;
-        if ($this->compareProp($tmp_property, $data)) {
-            return true;
-        }
-        $tmp_property = "{$property}_id";
-        return $this->compareProp($tmp_property, $data);
-    }
-    protected function validateDefaultProperty(mixed $value): bool
-    {
-        $defaults = [
-            0,
-            '',
-            null
-        ];
-        return in_array($value, $defaults);
-    }
-    protected function editModel(Model $model, string $getter, string $setter, mixed $value, bool $optional = false): Model
+    public function save(Model &$model): void
     {
         try {
-            $val = $model->{$getter}();
-            if ($optional and $this->validateDefaultProperty($val)) {
-                $model->{$setter}($value);
-            }
-        } catch (\Error|\Exception $e) {
-            $model->{$setter}($value);
+            $old = $this->defaultFind($model);
+            $this->update($model, $old);
+        } catch (BlankResult $e) {
+            $this->insert($model);
+            $model->setId($this->getConnection()->getPDO()->lastInsertId());
         }
-        return $model;
     }
-    public function mapModel(Model $model, array $data): Model
+    public function update(Model $model, Model $old): void
     {
-        /**
-         * Default Model map
-         * It is assumed that the Model properties are named like the table columns
-         */
-        foreach ($this->getProperties() as $property) {
-            $getter = $this->getMethod($property);
-            $setter = $this->getMethod($property, false);
-            if ($this->compareProperty($property, tmp_property: $tmp)) {
-                $model = $this->editModel($model, $getter, $setter, $data[$tmp]);
-                continue;
-            }
-            if (!method_exists($model, $setter)) {
-                continue;
-            }
-            if ($this->compareProperty($property, $data, $tmp)) {
-                $model = $this->editModel($model, $getter, $setter, $data[$tmp], true);
-            }
-            try {
-                $value = $model->{$getter}();
-                if ($this->validateDefaultProperty($value)) {
-                    error_log("Notice: {$property} has default value in " . get_called_class());
-                }
-            } catch (\Error | \Exception $e) {
-                error_log("Warning: Missing {$property} in data for " . get_called_class() . "::fillData");
-            }
-        }
-        return $model;
-    }
-    public function mapTable(Model $model, array $data): array
-    {
-        /**
-         * Default table map
-         * It is assumed that the table columns are named the same as the Model properties
-         */
-        foreach ($this->getRequiredColumns() as $column) {
-            $m = $this->getMethod($column);
-            if (!method_exists($model, $m)) {
-                error_log("Warning: Missing getter for {$column} in " . get_called_class() . "::mapArray");
-                continue;
-            }
-            if (!isset($data[$column])) {
-                $data[$column] = $model->{$m}();
-            }
-        }
-        foreach ($this->getOptionalColumns() as $column) {
-            $m = $this->getMethod($column);
-            if (!method_exists($model, $m)) {
-                continue;
-            }
-            if (!isset($data[$column])) {
-                $data[$column] = $model->{$m}();
-            }
-        }
-        return $data;
-    }
+        $model_values = $this->valuesForUpdate($model);
+        $old_values = $this->valuesForUpdate($old);
 
-    public function load(array $data): Model
-    {
-        return $this->mapModel($this->getNewModel()
-            ->setId($data['id']), $data);
-    }
-    public function save(Model $model): void
-    {
-        if (!$model->isDirty() and !$model->isNew()) {
+        $columns = [];
+        $values = [];
+        foreach ($this->fieldsForUpdate() as $i => $column) {
+            if (isset($model_values[$i]) and $old_values[$i] !== $model_values[$i]) {
+                $columns []= "`{$column}` = ?";
+                $values []= $model_values[$i];
+            }
+        }
+        if (count($columns) === 0) {
             return;
         }
-        if (!$model->isNew()) {
-            $this->update($model);
-            return;
-        }
-        $values = array_replace(array_flip($this->getColumns()), $this->mapTable($model, []));
-        $cols = array_fill(0, count($values), '?');
-        $query = $this->getQueryBuilder()->insert($this->getTable())->columns($this->getColumns())->values($cols);
-        $this->getConnection()->execute($query, array_values($values));
-    }
-    public function update(Model $model): void
-    {
-        if (!$model->isDirty() and !$model->isNew()) {
-            return;
-        }
-        $values = $this->mapTable($model, []);
-        $cols = array_map(function($column) {
-            return "{$column} = ?";
-        }, $values);
+
         $values = array_values($values);
-        $values []= $model->getId();
-        $query = $this->getQueryBuilder()->update($this->getTable())->set($cols)->where(['id = ?']);
+        $values []= $old->{$this->idProperty()}();
+        $query = $this->getQueryBuilder()->update($this->getTable())->set($columns)->where(["{$this->idField()}} = ?"]);
         $this->getConnection()->execute($query, $values);
     }
     public function create(array $data): Model
     {
-        return $this->mapModel($this->getNewModel()
-            ->setNew(), $data);
-    }
-    public function edit(Model $model, array $data): Model
-    {
-        foreach ($this->getColumns() as $col) {
-            if (isset($data[$col])) {
-                $m = $this->getMethod($col, false);
-                if (!method_exists($model, $m)) {
-                    continue;
-                }
-                $model->{$m}($data[$col]);
-            }
+        try {
+            return $this->defaultSearch($data);
+        } catch (PDOException | BlankResult $e) {
+            $data[$this->idField()] = 0;
+            return $this->load($data);
         }
-        return $model;
     }
     public function delete(Model $model): void
     {
         $query = $this->getQueryBuilder()->delete($this->getTable())->where(['id = ?']);
         $this->getConnection()->execute($query, [$model->getId()]);
+        $this->resetIndex();
+        $this->optimize();
+    }
+
+    protected function idProperty(): string
+    {
+        return 'getId';
+    }
+    protected function idField(): string
+    {
+        return 'id';
+    }
+    protected function insert(Model $model): void
+    {
+        $fields = $this->fieldsForInsert();
+        $fields_string = array_map(function($field) {
+            return "`{$field}`";
+        }, $fields);
+        $fields_questions = array_fill(0, count($fields), '?');
+        $query = $this->getQueryBuilder()->insert($this->getTable())->columns($fields_string)->values($fields_questions);
+        $values = $this->valuesForInsert($model);
+        $this->getConnection()->execute($query, $values);
+    }
+    protected function resetIndex(): void
+    {
+        $query = "ALTER TABLE `{$this->getTable()}` AUTO_INCREMENT = 1";
+        $this->getConnection()->query($query);
+    }
+    protected function optimize(): void
+    {
+        $query = "OPTIMIZE TABLE `{$this->getTable()}`";
+        $this->getConnection()->query($query);
+    }
+
+    protected function fetchOne(string $query, ?array $values = null): Model
+    {
+        if ($values !== null) {
+            $rs = $this->getConnection()->prepare($query);
+            $rs->execute($values);
+        } else {
+            $rs = $this->getConnection()->query($query);
+        }
+        $row = $rs->getFirstAsArray();
+        if (!$row) {
+            throw new BlankResult();
+        }
+        return $this->load($row);
+    }
+    protected function fetchMany(string $query, ?array $values = null): array
+    {
+        if ($values !== null) {
+            $rs = $this->getConnection()->prepare($query);
+            $rs->execute($values);
+        } else {
+            $rs = $this->getConnection()->query($query);
+        }
+        $rows = $rs->getAsArray();
+        if (!$rows) {
+            throw new BlankResult();
+        }
+        return array_map([$this, 'load'], $rows);
     }
 
     public function fetchById(int $id): Model
@@ -327,13 +187,20 @@ abstract class Repository implements RepositoryInterface
             ->from($this->getTable())
             ->where(['id = ?'])
             ->limit(1);
-        return $this->load($this->getConnection()->execute($query, [$id])->getFirstAsArray());
+        return $this->fetchOne($query, [$id]);
     }
     public function fetchAll(): array
     {
         $query = $this->getQueryBuilder()
             ->select()
             ->from($this->getTable());
-        return array_map([$this, 'load'], $this->getConnection()->query($query)->getAsArray());
+        return $this->fetchMany($query);
     }
+
+    abstract protected function fieldsForUpdate(): array;
+    abstract protected function fieldsForInsert(): array;
+    abstract protected function valuesForUpdate(Model $model): array;
+    abstract protected function valuesForInsert(Model $model): array;
+    abstract protected function defaultFind(Model $model): Model;
+    abstract protected function defaultSearch(array $data): Model;
 }
diff --git a/src/Concept/Model/Repository.php b/src/Concept/Model/Repository.php
index fac68fa..998d365 100644
--- a/src/Concept/Model/Repository.php
+++ b/src/Concept/Model/Repository.php
@@ -27,26 +27,6 @@ interface Repository
      * @return string
      */
     public function getTable(): string;
-    /**
-     * Get table columns
-     * @return array
-     */
-    public function getColumns(): array;
-    /**
-     * Get required columns
-     * @return array
-     */
-    public function getRequiredColumns(): array;
-    /**
-     * Get optional columns
-     * @return array
-     */
-    public function getOptionalColumns(): array;
-    /**
-     * Get Model properties
-     * @return array
-     */
-    public function getProperties(): array;
 
     /**
      * @param Connection $connection
@@ -73,53 +53,6 @@ interface Repository
      * @return Repository
      */
     public function setTable(string $table): Repository;
-    /**
-     * Set columns in table
-     * @param array $columns
-     * @return Repository
-     */
-    public function setColumns(array $columns): Repository;
-    /**
-     * Set required columns
-     * Optional
-     * @param array $columns
-     * @return Repository
-     */
-    public function setRequiredColumns(array $columns): Repository;
-    /**
-     * Set optional columns
-     * @param array $columns
-     * @return Repository
-     */
-    public function setOptionalColumns(array $columns): Repository;
-    /**
-     * Set Model properties
-     * @param array $properties
-     * @return Repository
-     */
-    public function setProperties(array $properties): Repository;
-
-    /**
-     * @param string $column
-     * @return Repository
-     */
-    public function addColumn(string $column): Repository;
-    /**
-     * @param string $column
-     * @return Repository
-     */
-    public function addRequiredColumn(string $column): Repository;
-    /**
-     * @param string $column
-     * @return Repository
-     */
-    public function addOptionalColumn(string $column): Repository;
-    /**
-     * @param string $property
-     * @param $value
-     * @return Repository
-     */
-    public function addProperty(string $property): Repository;
 
     /**
      * Set up the Repository
@@ -133,39 +66,6 @@ interface Repository
      */
     public function setup(): Repository;
 
-    /**
-     * Get clean empty Model
-     * @return Model
-     */
-    public function getNewModel(): Model;
-    /**
-     * Get Model method
-     * @param string $property
-     * @param bool $get
-     * @return string
-     */
-    public function getMethod(string $property, bool $get = true): string;
-    /**
-     * @param string $method
-     * @return string
-     */
-    public function getProperty(string $method): string;
-
-    /**
-     * Fill empty Model with data
-     * @param Model $model
-     * @param array $data
-     * @return Model
-     */
-    public function mapModel(Model $model, array $data): Model;
-    /**
-     * Fill data array with Model values. Accepts a preset data array
-     * @param Model $model
-     * @param array $data
-     * @return array
-     */
-    public function mapTable(Model $model, array $data): array;
-
     /**
      * Transform result array to Model
      * @param array $data
@@ -177,26 +77,19 @@ interface Repository
      * @param Model $model
      * @return void
      */
-    public function save(Model $model): void;
+    public function save(Model &$model): void;
     /**
      * Update table value with Model
      * @param Model $model
      * @return void
      */
-    public function update(Model $model): void;
+    public function update(Model $model, Model $old): void;
     /**
      * Create new Model with data
      * @param array $data
      * @return Model
      */
     public function create(array $data): Model;
-    /**
-     * Edit Model with data
-     * @param Model $model
-     * @param array $data
-     * @return Model
-     */
-    public function edit(Model $model, array $data): Model;
     /**
      * Delete Model from table
      * @param Model $model