Laravel-Backpack /
CRUD
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| Total Complexity | 56 |
| Total Lines | 358 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | 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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| 9 | trait Create |
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| 10 | { |
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| 11 | /* |
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| 12 | |-------------------------------------------------------------------------- |
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| 13 | | CREATE |
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| 14 | |-------------------------------------------------------------------------- |
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| 15 | */ |
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| 16 | |||
| 17 | /** |
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| 18 | * Insert a row in the database. |
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| 19 | * |
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| 20 | * @param array $input All input values to be inserted. |
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| 21 | * @return \Illuminate\Database\Eloquent\Model |
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| 22 | */ |
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| 23 | public function create($input) |
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| 24 | { |
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| 25 | [$directInputs, $relationInputs] = $this->splitInputIntoDirectAndRelations($input); |
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| 26 | |||
| 27 | if ($this->get('create.useDatabaseTransactions') ?? config('backpack.base.useDatabaseTransactions', false)) { |
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| 28 | return DB::transaction(fn () => $this->createModelAndRelations($directInputs, $relationInputs)); |
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| 29 | } |
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| 30 | |||
| 31 | return $this->createModelAndRelations($directInputs, $relationInputs); |
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| 32 | } |
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| 33 | |||
| 34 | private function createModelAndRelations(array $directInputs, array $relationInputs): Model |
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| 35 | { |
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| 36 | $item = $this->model->create($directInputs); |
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| 37 | $this->createRelationsForItem($item, $relationInputs); |
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| 38 | |||
| 39 | return $item; |
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| 40 | } |
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| 41 | |||
| 42 | /** |
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| 43 | * Get all fields needed for the ADD NEW ENTRY form. |
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| 44 | * |
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| 45 | * @return array The fields with attributes and fake attributes. |
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| 46 | */ |
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| 47 | public function getCreateFields() |
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| 50 | } |
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| 51 | |||
| 52 | /** |
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| 53 | * Get all fields with relation set (model key set on field). |
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| 54 | * |
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| 55 | * @param array $fields |
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| 56 | * @return array The fields with model key set. |
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| 57 | */ |
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| 58 | public function getRelationFields($fields = []) |
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| 87 | } |
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| 88 | |||
| 89 | /** |
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| 90 | * --------------- |
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| 91 | * PRIVATE METHODS |
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| 92 | * ---------------. |
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| 93 | */ |
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| 94 | |||
| 95 | /** |
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| 96 | * Create relations for the provided model. |
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| 97 | * |
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| 98 | * @param \Illuminate\Database\Eloquent\Model $item The current CRUD model. |
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| 99 | * @param array $formattedRelations The form data. |
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| 100 | * @return bool|null |
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| 101 | */ |
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| 102 | private function createRelationsForItem($item, $formattedRelations) |
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| 103 | { |
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| 104 | // no relations to create |
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| 105 | if (empty($formattedRelations)) { |
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| 106 | return false; |
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| 107 | } |
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| 108 | |||
| 109 | foreach ($formattedRelations as $relationMethod => $relationDetails) { |
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| 110 | $relation = $item->{$relationMethod}(); |
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| 111 | $relationType = $relationDetails['relation_type']; |
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| 112 | |||
| 113 | switch ($relationType) { |
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| 114 | case 'HasOne': |
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| 115 | case 'MorphOne': |
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| 116 | $this->createUpdateOrDeleteOneToOneRelation($relation, $relationMethod, $relationDetails); |
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| 117 | break; |
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| 118 | case 'HasMany': |
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| 119 | case 'MorphMany': |
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| 120 | $relationValues = $relationDetails['values'][$relationMethod]; |
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| 121 | // if relation values are null we can only attach, also we check if we sent |
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| 122 | // - a single dimensional array: [1,2,3] |
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| 123 | // - an array of arrays: [[1][2][3]] |
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| 124 | // if is as single dimensional array we can only attach. |
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| 125 | if ($relationValues === null || ! is_multidimensional_array($relationValues)) { |
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| 126 | $this->attachManyRelation($item, $relation, $relationDetails, $relationValues); |
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| 127 | } else { |
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| 128 | $this->createManyEntries($item, $relation, $relationMethod, $relationDetails); |
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| 129 | } |
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| 130 | break; |
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| 131 | case 'BelongsToMany': |
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| 132 | case 'MorphToMany': |
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| 133 | $values = $relationDetails['values'][$relationMethod] ?? []; |
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| 134 | $values = is_string($values) ? json_decode($values, true) : $values; |
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| 135 | |||
| 136 | // disabling ConvertEmptyStringsToNull middleware may return null from json_decode() if an empty string is used. |
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| 137 | // we need to make sure no null value can go foward so we reassure that values is not null after json_decode() |
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| 138 | $values = $values ?? []; |
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| 139 | |||
| 140 | $relationValues = []; |
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| 141 | |||
| 142 | if (is_array($values) && is_multidimensional_array($values)) { |
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| 143 | foreach ($values as $value) { |
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| 144 | if (isset($value[$relationMethod])) { |
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| 145 | $array = Arr::except($value, $relationMethod); |
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| 146 | $array[$item->{$relationMethod}()->getRelatedPivotKeyName()] = $value[$relationMethod]; |
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| 147 | $relationValues[] = $array; |
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| 148 | } |
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| 149 | } |
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| 150 | } |
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| 151 | |||
| 152 | // if there is no relation data, and the values array is single dimensional we have |
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| 153 | // an array of keys with no aditional pivot data. sync those. |
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| 154 | if (empty($relationValues)) { |
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| 155 | $relationValues = array_values($values); |
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| 156 | } |
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| 157 | if ($item->{$relationMethod}->count() > 0 && is_multidimensional_array($values)) { |
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| 158 | // get the key name of the pivot table (usually id, but could be something else if the dev has set it in the model |
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| 159 | $keyName = $item->{$relationMethod}[0]->pivot->getKeyName(); |
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| 160 | $items = $item->{$relationMethod}()->withPivot($keyName)->get(); |
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| 161 | $items->each(function ($item) use (&$relationValues, $keyName) { |
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| 162 | if ($item->pivot) { |
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| 163 | $keys = array_column($relationValues, $keyName); |
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| 164 | $key = $item->pivot->{$keyName}; |
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| 165 | if (! in_array((int) $key, $keys)) { |
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| 166 | $item->pivot->delete(); |
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| 167 | } else { |
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| 168 | $index = array_search($key, $keys); |
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| 169 | $item->pivot->update($relationValues[$index]); |
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| 170 | unset($relationValues[$index]); |
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| 171 | $relationValues = array_values($relationValues); |
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| 172 | } |
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| 173 | } |
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| 174 | }); |
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| 175 | $item->{$relationMethod}()->attach($relationValues); |
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| 176 | } else { |
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| 177 | $item->{$relationMethod}()->sync($relationValues); |
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| 178 | } |
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| 179 | $item->refresh(); |
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| 180 | break; |
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| 181 | } |
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| 182 | } |
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| 183 | } |
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| 184 | |||
| 185 | /** |
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| 186 | * Save the attributes of a given HasOne or MorphOne relationship on the |
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| 187 | * related entry, create or delete it, depending on what was sent in the form. |
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| 188 | * |
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| 189 | * For HasOne and MorphOne relationships, the dev might want to a few different things: |
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| 190 | * (A) save an attribute on the related entry (eg. passport.number) |
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| 191 | * (B) set an attribute on the related entry to NULL (eg. slug.slug) |
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| 192 | * (C) save an entire related entry (eg. passport) |
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| 193 | * (D) delete the entire related entry (eg. passport) |
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| 194 | * |
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| 195 | * @param \Illuminate\Database\Eloquent\Relations\HasOne|\Illuminate\Database\Eloquent\Relations\MorphOne $relation |
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| 196 | * @param string $relationMethod The name of the relationship method on the main Model. |
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| 197 | * @param array $relationDetails Details about that relationship. For example: |
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| 198 | * [ |
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| 199 | * 'model' => 'App\Models\Passport', |
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| 200 | * 'parent' => 'App\Models\Pet', |
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| 201 | * 'entity' => 'passport', |
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| 202 | * 'attribute' => 'passport', |
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| 203 | * 'values' => **THE TRICKY BIT**, |
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| 204 | * ] |
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| 205 | * @return Model|null |
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| 206 | */ |
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| 207 | private function createUpdateOrDeleteOneToOneRelation($relation, $relationMethod, $relationDetails) |
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| 208 | { |
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| 209 | // Let's see which scenario we're treating, depending on the contents of $relationDetails: |
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| 210 | // - (A) ['number' => 1315, 'name' => 'Something'] (if passed using a text/number/etc field) |
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| 211 | // - (B) ['slug' => null] (if the 'slug' attribute on the 'slug' related entry needs to be cleared) |
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| 212 | // - (C) ['passport' => [['number' => 1314, 'name' => 'Something']]] (if passed using a repeatable field) |
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| 213 | // - (D) ['passport' => null] (if deleted from the repeatable field) |
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| 214 | |||
| 215 | // Scenario C or D |
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| 216 | if (array_key_exists($relationMethod, $relationDetails['values'])) { |
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| 217 | $relationMethodValue = $relationDetails['values'][$relationMethod]; |
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| 218 | |||
| 219 | // Scenario D |
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| 220 | if (is_null($relationMethodValue) && $relationDetails['entity'] === $relationMethod) { |
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| 221 | $relation->first()?->delete(); |
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| 222 | |||
| 223 | return null; |
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| 224 | } |
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| 225 | |||
| 226 | // Scenario C (when it's an array inside an array, because it's been added as one item inside a repeatable field) |
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| 227 | if (gettype($relationMethodValue) == 'array' && is_multidimensional_array($relationMethodValue)) { |
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| 228 | $relationMethodValue = $relationMethodValue[0]; |
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| 229 | } |
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| 230 | } |
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| 231 | // saving process |
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| 232 | $input = $relationMethodValue ?? $relationDetails['values']; |
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| 233 | [$directInputs, $relationInputs] = $this->splitInputIntoDirectAndRelations($input, $relationDetails, $relationMethod); |
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| 234 | |||
| 235 | $item = $relation->updateOrCreate([], $directInputs); |
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| 236 | |||
| 237 | $this->createRelationsForItem($item, $relationInputs); |
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| 238 | |||
| 239 | return $item; |
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| 240 | } |
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| 241 | |||
| 242 | /** |
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| 243 | * When using the HasMany/MorphMany relations as selectable elements we use this function to "mimic-sync" in those relations. |
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| 244 | * Since HasMany/MorphMany does not have the `sync` method, we manually re-create it. |
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| 245 | * Here we add the entries that developer added and remove the ones that are not in the list. |
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| 246 | * This removal process happens with the following rules: |
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| 247 | * - by default Backpack will behave like a `sync` from M-M relations: it deletes previous entries and add only the current ones. |
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| 248 | * - `force_delete` is configurable in the field, it's `true` by default. When false, if connecting column is nullable instead of deleting the row we set the column to null. |
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| 249 | * - `fallback_id` could be provided. In this case instead of deleting we set the connecting key to whatever developer gives us. |
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| 250 | * |
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| 251 | * @return mixed |
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| 252 | */ |
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| 253 | private function attachManyRelation($item, $relation, $relationDetails, $relationValues) |
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| 288 | } |
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| 289 | |||
| 290 | private function handleManyRelationItemRemoval($modelInstance, $removedEntries, $relationDetails, $relationForeignKey) |
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| 325 | } |
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| 326 | |||
| 327 | /** |
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| 328 | * Handle HasMany/MorphMany relations when used as creatable entries in the crud. |
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| 329 | * By using repeatable field, developer can allow the creation of such entries |
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| 330 | * in the crud forms. |
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| 331 | * |
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| 332 | * @param $entry - eg: story |
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| 333 | * @param $relation - eg story HasMany monsters |
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| 334 | * @param $relationMethod - eg: monsters |
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| 335 | * @param $relationDetails - eg: info about relation including submited values |
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| 336 | * @return void |
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| 337 | */ |
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| 338 | private function createManyEntries($entry, $relation, $relationMethod, $relationDetails) |
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| 367 | } |
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| 368 | } |
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| 370 |
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