Laravel-Backpack /
CRUD
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| Total Complexity | 68 |
| Total Lines | 409 |
| Duplicated Lines | 0 % |
| Changes | 2 | ||
| Bugs | 1 | Features | 0 |
Complex classes like Create often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Create, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 12 | trait Create |
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| 13 | { |
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| 14 | /* |
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| 15 | |-------------------------------------------------------------------------- |
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| 16 | | CREATE |
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| 17 | |-------------------------------------------------------------------------- |
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| 18 | */ |
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| 19 | |||
| 20 | /** |
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| 21 | * Insert a row in the database. |
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| 22 | * |
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| 23 | * @param array $data All input values to be inserted. |
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| 24 | * |
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| 25 | * @return \Illuminate\Database\Eloquent\Model |
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| 26 | */ |
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| 27 | public function create($data) |
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| 28 | { |
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| 29 | $data = $this->decodeJsonCastedAttributes($data); |
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| 30 | $data = $this->compactFakeFields($data); |
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| 31 | $data = $this->changeBelongsToNamesFromRelationshipToForeignKey($data); |
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| 32 | |||
| 33 | // omit the n-n relationships when updating the eloquent item |
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| 34 | $nn_relationships = Arr::pluck($this->getRelationFieldsWithPivot(), 'name'); |
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| 35 | |||
| 36 | $item = $this->model->create(Arr::except($data, $nn_relationships)); |
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| 37 | |||
| 38 | |||
| 39 | // if there are any other relations create them. |
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| 40 | $this->createRelations($item, $data); |
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| 41 | |||
| 42 | return $item; |
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| 43 | } |
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| 44 | |||
| 45 | /** |
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| 46 | * Get all fields needed for the ADD NEW ENTRY form. |
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| 47 | * |
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| 48 | * @return array The fields with attributes and fake attributes. |
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| 49 | */ |
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| 50 | public function getCreateFields() |
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| 51 | { |
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| 52 | return $this->fields(); |
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| 53 | } |
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| 54 | |||
| 55 | /** |
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| 56 | * Get all fields with relation set (model key set on field). |
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| 57 | * |
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| 58 | * @return array The fields with model key set. |
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| 59 | */ |
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| 60 | public function getRelationFields() |
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| 80 | } |
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| 81 | |||
| 82 | /** |
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| 83 | * Get all fields with n-n relation set (pivot table is true). |
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| 84 | * |
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| 85 | * @return array The fields with n-n relationships. |
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| 86 | */ |
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| 87 | public function getRelationFieldsWithPivot() |
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| 93 | }); |
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| 94 | } |
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| 95 | |||
| 96 | /** |
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| 97 | * Create the relations for the current model. |
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| 98 | * |
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| 99 | * @param \Illuminate\Database\Eloquent\Model $item The current CRUD model. |
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| 100 | * @param array $data The form data. |
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| 101 | */ |
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| 102 | public function createRelations($item, $data) |
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| 111 | } |
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| 112 | |||
| 113 | /** |
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| 114 | * Sync the declared many-to-many associations through the pivot field. |
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| 115 | * |
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| 116 | * @param \Illuminate\Database\Eloquent\Model $model The current CRUD model. |
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| 117 | * @param array $data The form data. |
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| 118 | */ |
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| 119 | public function syncPivot($model, $data) |
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| 120 | { |
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| 121 | $fields_with_relationships = $this->getRelationFieldsWithPivot(); |
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| 122 | foreach ($fields_with_relationships as $field) { |
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| 123 | $values = isset($data[$field['name']]) ? $data[$field['name']] : []; |
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| 124 | |||
| 125 | // if a JSON was passed instead of an array, turn it into an array |
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| 126 | if (is_string($values)) { |
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| 127 | $decoded_values = json_decode($values, true); |
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| 128 | $values = []; |
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| 129 | // array is not multidimensional |
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| 130 | if (count($decoded_values) != count($decoded_values, COUNT_RECURSIVE)) { |
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| 131 | foreach ($decoded_values as $value) { |
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| 132 | $values[] = $value[$field['name']]; |
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| 133 | } |
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| 134 | } else { |
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| 135 | $values = $decoded_values; |
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| 136 | } |
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| 137 | } |
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| 138 | |||
| 139 | $relation_data = []; |
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| 140 | |||
| 141 | foreach ($values as $pivot_id) { |
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| 142 | if ($pivot_id != '') { |
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| 143 | $pivot_data = []; |
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| 144 | |||
| 145 | if (isset($field['pivotFields'])) { |
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| 146 | // array is not multidimensional |
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| 147 | if (count($field['pivotFields']) == count($field['pivotFields'], COUNT_RECURSIVE)) { |
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| 148 | foreach ($field['pivotFields'] as $pivot_field_name) { |
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| 149 | $pivot_data[$pivot_field_name] = $data[$pivot_field_name][$pivot_id]; |
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| 150 | } |
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| 151 | } else { |
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| 152 | $field_data = json_decode($data[$field['name']], true); |
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| 153 | |||
| 154 | // we grab from the parsed data the specific values for this pivot |
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| 155 | $pivot_data = Arr::first($field_data, function ($item) use ($pivot_id, $field) { |
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| 156 | return $item[$field['name']] === $pivot_id; |
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| 157 | }); |
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| 158 | |||
| 159 | // we remove the relation field from extra pivot data as we already have the relation. |
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| 160 | unset($pivot_data[$field['name']]); |
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| 161 | } |
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| 162 | } |
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| 163 | |||
| 164 | $relation_data[$pivot_id] = $pivot_data; |
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| 165 | } |
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| 166 | } |
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| 167 | |||
| 168 | $model->{$field['name']}()->sync($relation_data); |
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| 169 | |||
| 170 | if (isset($field['morph']) && $field['morph'] && isset($data[$field['name']])) { |
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| 171 | $values = $data[$field['name']]; |
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| 172 | $model->{$field['name']}()->sync($values); |
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| 173 | } |
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| 174 | } |
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| 175 | } |
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| 176 | |||
| 177 | /** |
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| 178 | * Handles 1-1 and 1-n relations. In case 1-1 it handles subsequent relations in connected models |
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| 179 | * For example, a Monster > HasOne Address > BelongsTo a Country. |
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| 180 | * |
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| 181 | * @param \Illuminate\Database\Eloquent\Model $item The current CRUD model. |
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| 182 | * @param array $formattedData The form data. |
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| 183 | * |
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| 184 | * @return bool|null |
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| 185 | */ |
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| 186 | private function createRelationsForItem($item, $formattedData) |
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| 187 | { |
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| 188 | if (! isset($formattedData['relations'])) { |
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| 189 | return false; |
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| 190 | } |
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| 191 | |||
| 192 | foreach ($formattedData['relations'] as $relationMethod => $relationData) { |
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| 193 | if (! isset($relationData['model'])) { |
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| 194 | continue; |
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| 195 | } |
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| 196 | |||
| 197 | $relation = $item->{$relationMethod}(); |
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| 198 | $relation_type = get_class($relation); |
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| 199 | |||
| 200 | switch ($relation_type) { |
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| 201 | case HasOne::class: |
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| 202 | case MorphOne::class: |
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| 203 | |||
| 204 | // we first check if there are relations of the relation |
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| 205 | if (isset($relationData['relations'])) { |
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| 206 | // if there are nested relations, we first add the BelongsTo like in main entry |
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| 207 | $belongsToRelations = Arr::where($relationData['relations'], function ($relation_data) { |
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| 208 | return $relation_data['relation_type'] == 'BelongsTo'; |
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| 209 | }); |
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| 210 | |||
| 211 | // adds the values of the BelongsTo relations of this entity to the array of values that will |
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| 212 | // be saved at the same time like we do in parent entity belongs to relations |
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| 213 | $valuesWithRelations = $this->associateHasOneBelongsTo($belongsToRelations, $relationData['values'], $relation->getModel()); |
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| 214 | |||
| 215 | // remove previously added BelongsTo relations from relation data. |
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| 216 | $relationData['relations'] = Arr::where($relationData['relations'], function ($item) { |
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| 217 | return $item['relation_type'] != 'BelongsTo'; |
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| 218 | }); |
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| 219 | |||
| 220 | $modelInstance = $relation->updateOrCreate([], $valuesWithRelations); |
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| 221 | } else { |
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| 222 | $modelInstance = $relation->updateOrCreate([], $relationData['values']); |
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| 223 | } |
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| 224 | break; |
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| 225 | |||
| 226 | case HasMany::class: |
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| 227 | case MorphMany::class: |
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| 228 | $relation_values = $relationData['values'][$relationMethod]; |
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| 229 | |||
| 230 | if (is_string($relation_values)) { |
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| 231 | $relation_values = json_decode($relationData['values'][$relationMethod], true); |
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| 232 | } |
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| 233 | |||
| 234 | if ($relation_values === null || count($relation_values) == count($relation_values, COUNT_RECURSIVE)) { |
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| 235 | $this->attachManyRelation($item, $relation, $relationMethod, $relationData, $relation_values); |
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| 236 | } else { |
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| 237 | $this->createManyEntries($item, $relation, $relationMethod, $relationData); |
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| 238 | } |
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| 239 | break; |
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| 240 | } |
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| 241 | |||
| 242 | if (isset($relationData['relations'])) { |
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| 243 | $this->createRelationsForItem($modelInstance, ['relations' => $relationData['relations']]); |
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| 244 | } |
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| 245 | } |
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| 246 | } |
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| 247 | |||
| 248 | /** |
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| 249 | * Associate the nested HasOne -> BelongsTo relations by adding the "connecting key" |
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| 250 | * to the array of values that is going to be saved with HasOne relation. |
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| 251 | * |
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| 252 | * @param array $belongsToRelations |
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| 253 | * @param array $modelValues |
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| 254 | * @param Model $relationInstance |
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| 255 | * @return array |
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| 256 | */ |
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| 257 | private function associateHasOneBelongsTo($belongsToRelations, $modelValues, $modelInstance) |
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| 258 | { |
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| 259 | foreach ($belongsToRelations as $methodName => $values) { |
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| 260 | $relation = $modelInstance->{$methodName}(); |
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| 261 | |||
| 262 | $modelValues[$relation->getForeignKeyName()] = $values['values'][$methodName]; |
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| 263 | } |
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| 264 | |||
| 265 | return $modelValues; |
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| 266 | } |
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| 267 | |||
| 268 | /** |
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| 269 | * Get a relation data array from the form data. |
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| 270 | * For each relation defined in the fields through the entity attribute, set the model, the parent model and the |
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| 271 | * attribute values. |
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| 272 | * |
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| 273 | * We traverse this relation array later to create the relations, for example: |
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| 274 | * |
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| 275 | * Current model HasOne Address, this Address (line_1, country_id) BelongsTo Country through country_id in Address Model. |
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| 276 | * |
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| 277 | * So when editing current model crud user have two fields address.line_1 and address.country (we infer country_id from relation) |
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| 278 | * |
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| 279 | * Those will be nested accordingly in this relation array, so address relation will have a nested relation with country. |
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| 280 | * |
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| 281 | * |
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| 282 | * @param array $data The form data. |
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| 283 | * |
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| 284 | * @return array The formatted relation data. |
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| 285 | */ |
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| 286 | private function getRelationDataFromFormData($data) |
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| 287 | { |
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| 288 | // exclude the already attached belongs to relations but include nested belongs to. |
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| 289 | $relation_fields = Arr::where($this->getRelationFields(), function ($field, $key) { |
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| 290 | return $field['relation_type'] !== 'BelongsTo' || $this->isNestedRelation($field); |
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| 291 | }); |
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| 292 | |||
| 293 | $relationData = []; |
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| 294 | |||
| 295 | foreach ($relation_fields as $relation_field) { |
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| 296 | $attributeKey = $this->parseRelationFieldNamesFromHtml([$relation_field])[0]['name']; |
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| 297 | |||
| 298 | if ((! is_null(Arr::get($data, $attributeKey)) || $this->isNestedRelation($relation_field)) && isset($relation_field['pivot']) && $relation_field['pivot'] !== true) { |
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| 299 | $key = implode('.relations.', explode('.', $this->getOnlyRelationEntity($relation_field))); |
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| 300 | $fieldData = Arr::get($relationData, 'relations.'.$key, []); |
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| 301 | if (! array_key_exists('model', $fieldData)) { |
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| 302 | $fieldData['model'] = $relation_field['model']; |
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| 303 | } |
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| 304 | if (! array_key_exists('parent', $fieldData)) { |
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| 305 | $fieldData['parent'] = $this->getRelationModel($attributeKey, -1); |
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| 306 | } |
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| 307 | |||
| 308 | // when using HasMany/MorphMany if fallback_id is provided instead of deleting the models |
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| 309 | // from database we resort to this fallback provided by developer |
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| 310 | if (array_key_exists('fallback_id', $relation_field)) { |
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| 311 | $fieldData['fallback_id'] = $relation_field['fallback_id']; |
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| 312 | } |
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| 313 | |||
| 314 | // when using HasMany/MorphMany and column is nullable, by default backpack sets the value to null. |
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| 315 | // this allow developers to override that behavior and force deletion from database |
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| 316 | $fieldData['force_delete'] = $relation_field['force_delete'] ?? false; |
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| 317 | |||
| 318 | if (! array_key_exists('relation_type', $fieldData)) { |
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| 319 | $fieldData['relation_type'] = $relation_field['relation_type']; |
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| 320 | } |
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| 321 | $relatedAttribute = Arr::last(explode('.', $attributeKey)); |
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| 322 | $fieldData['values'][$relatedAttribute] = Arr::get($data, $attributeKey); |
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| 323 | |||
| 324 | Arr::set($relationData, 'relations.'.$key, $fieldData); |
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| 325 | } |
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| 326 | } |
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| 327 | |||
| 328 | return $relationData; |
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| 329 | } |
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| 330 | |||
| 331 | /** |
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| 332 | * When using the HasMany/MorphMany relations as selectable elements we use this function to sync those relations. |
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| 333 | * Here we allow for different functionality than when creating. Developer could use this relation as a |
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| 334 | * selectable list of items that can belong to one/none entity at any given time. |
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| 335 | * |
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| 336 | * @return void |
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| 337 | */ |
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| 338 | public function attachManyRelation($item, $relation, $relationMethod, $relationData, $relation_values) |
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| 383 | } |
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| 384 | } |
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| 385 | } |
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| 386 | } |
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| 387 | |||
| 388 | /** |
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| 389 | * Handle HasMany/MorphMany relations when used as creatable entries in the crud. |
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| 390 | * By using repeatable field, developer can allow the creation of such entries |
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| 391 | * in the crud forms. |
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| 392 | * |
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| 393 | * @return void |
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| 394 | */ |
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| 395 | public function createManyEntries($entry, $relation, $relationMethod, $relationData) |
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| 421 | } |
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| 422 | } |
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| 423 | } |
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| 425 |
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