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<?php |
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namespace Backpack\CRUD\PanelTraits; |
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trait Fields |
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{ |
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// ------------ |
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// FIELDS |
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// ------------ |
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/** |
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* Add a field to the create/update form or both. |
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* |
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* @param string|array $field The new field. |
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* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. Default is 'both'. |
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* |
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* @return self |
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*/ |
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public function addField($field, $form = 'both') |
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{ |
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// if the field_definition_array array is a string, it means the programmer was lazy and has only passed the name |
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// set some default values, so the field will still work |
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if (is_string($field)) { |
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$completeFieldsArray['name'] = $field; |
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} else { |
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$completeFieldsArray = $field; |
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} |
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// if this is a relation type field and no corresponding model was specified, get it from the relation method |
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// defined in the main model |
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if (isset($completeFieldsArray['entity']) && ! isset($completeFieldsArray['model'])) { |
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$completeFieldsArray['model'] = $this->getRelationModel($completeFieldsArray['entity']); |
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} |
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// if the label is missing, we should set it |
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if (! isset($completeFieldsArray['label'])) { |
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$completeFieldsArray['label'] = mb_ucfirst(str_replace('_', ' ', $completeFieldsArray['name'])); |
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} |
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// if the field type is missing, we should set it |
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if (! isset($completeFieldsArray['type'])) { |
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$completeFieldsArray['type'] = $this->getFieldTypeFromDbColumnType($completeFieldsArray['name']); |
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} |
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// if a tab was mentioned, we should enable it |
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if (isset($completeFieldsArray['tab'])) { |
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if (! $this->tabsEnabled()) { |
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$this->enableTabs(); |
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} |
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} |
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$this->transformFields($form, function ($fields) use ($completeFieldsArray) { |
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$fields[$completeFieldsArray['name']] = $completeFieldsArray; |
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return $fields; |
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}); |
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return $this; |
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} |
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/** |
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* Add multiple fields to the create/update form or both. |
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* |
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* @param array $fields The new fields. |
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* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. Default is 'both'. |
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*/ |
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public function addFields($fields, $form = 'both') |
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{ |
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if (count($fields)) { |
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foreach ($fields as $field) { |
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$this->addField($field, $form); |
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} |
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} |
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} |
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/** |
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* Move the most recently added field after the given target field. |
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* |
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* @param string $targetFieldName The target field name. |
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* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. Default is 'both'. |
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*/ |
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public function afterField($targetFieldName, $form = 'both') |
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{ |
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$this->transformFields($form, function ($fields) use ($targetFieldName) { |
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return $this->moveField($fields, $targetFieldName, false); |
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}); |
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} |
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/** |
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* Move the most recently added field before the given target field. |
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* |
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* @param string $targetFieldName The target field name. |
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* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. Default is 'both'. |
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*/ |
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public function beforeField($targetFieldName, $form = 'both') |
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{ |
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$this->transformFields($form, function ($fields) use ($targetFieldName) { |
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return $this->moveField($fields, $targetFieldName, true); |
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}); |
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} |
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/** |
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* Move the most recently added field before or after the given target field. Default is before. |
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* |
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* @param array $fields The form fields. |
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* @param string $targetFieldName The target field name. |
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* @param bool $before If true, the field will be moved before the target field, otherwise it will be moved after it. |
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* |
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* @return array |
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*/ |
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private function moveField($fields, $targetFieldName, $before = true) |
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{ |
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if (array_key_exists($targetFieldName, $fields)) { |
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$targetFieldPosition = $before ? array_search($targetFieldName, array_keys($fields)) |
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: array_search($targetFieldName, array_keys($fields)) + 1; |
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if ($targetFieldPosition >= (count($fields) - 1)) { |
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// target field name is same as element |
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return $fields; |
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} |
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$element = array_pop($fields); |
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$beginningArrayPart = array_slice($fields, 0, $targetFieldPosition, true); |
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$endingArrayPart = array_slice($fields, $targetFieldPosition, null, true); |
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$fields = array_merge($beginningArrayPart, [$element['name'] => $element], $endingArrayPart); |
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} |
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return $fields; |
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} |
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/** |
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* Remove a certain field from the create/update/both forms by its name. |
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* |
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* @param string $name Field name (as defined with the addField() procedure) |
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* @param string $form update/create/both |
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*/ |
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public function removeField($name, $form = 'both') |
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{ |
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$this->transformFields($form, function ($fields) use ($name) { |
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array_forget($fields, $name); |
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return $fields; |
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}); |
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} |
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/** |
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* Remove many fields from the create/update/both forms by their name. |
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* |
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* @param array $array_of_names A simple array of the names of the fields to be removed. |
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* @param string $form update/create/both |
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*/ |
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public function removeFields($array_of_names, $form = 'both') |
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{ |
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if (! empty($array_of_names)) { |
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foreach ($array_of_names as $name) { |
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$this->removeField($name, $form); |
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} |
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} |
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} |
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/** |
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* Remove all fields from the create/update/both forms. |
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* |
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* @param string $form update/create/both |
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*/ |
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public function removeAllFields($form = 'both') |
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{ |
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$current_fields = $this->getCurrentFields(); |
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if (! empty($current_fields)) { |
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foreach ($current_fields as $field) { |
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$this->removeField($field['name'], $form); |
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} |
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} |
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} |
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/** |
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* Update value of a given key for a current field. |
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* |
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* @param string $field The field |
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* @param array $modifications An array of changes to be made. |
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* @param string $form update/create/both |
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*/ |
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public function modifyField($field, $modifications, $form = 'both') |
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{ |
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foreach ($modifications as $key => $newValue) { |
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switch (strtolower($form)) { |
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case 'create': |
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$this->create_fields[$field][$key] = $newValue; |
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break; |
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case 'update': |
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$this->update_fields[$field][$key] = $newValue; |
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break; |
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default: |
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$this->create_fields[$field][$key] = $newValue; |
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$this->update_fields[$field][$key] = $newValue; |
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break; |
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} |
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} |
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} |
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/** |
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* Set label for a specific field. |
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* |
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* @param string $field |
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* @param string $label |
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*/ |
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public function setFieldLabel($field, $label) |
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{ |
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if (isset($this->create_fields[$field])) { |
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$this->create_fields[$field]['label'] = $label; |
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} |
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if (isset($this->update_fields[$field])) { |
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$this->update_fields[$field]['label'] = $label; |
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} |
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} |
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/** |
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* Check if field is the first of its type in the given fields array. |
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* It's used in each field_type.blade.php to determine wether to push the css and js content or not (we only need to push the js and css for a field the first time it's loaded in the form, not any subsequent times). |
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* |
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* @param array $field The current field being tested if it's the first of its type. |
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* |
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* @return bool true/false |
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*/ |
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public function checkIfFieldIsFirstOfItsType($field) |
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{ |
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$fields_array = $this->getCurrentFields(); |
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$first_field = $this->getFirstOfItsTypeInArray($field['type'], $fields_array); |
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if ($field['name'] == $first_field['name']) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Decode attributes that are casted as array/object/json in the model. |
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* So that they are not json_encoded twice before they are stored in the db |
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* (once by Backpack in front-end, once by Laravel Attribute Casting). |
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*/ |
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6 |
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public function decodeJsonCastedAttributes($data, $form, $id = false) |
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{ |
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// get the right fields according to the form type (create/update) |
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6 |
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$fields = $this->getFields($form, $id); |
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$casted_attributes = $this->model->getCastedAttributes(); |
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250
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foreach ($fields as $field) { |
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253
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// Test the field is castable |
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5 |
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if (isset($field['name']) && array_key_exists($field['name'], $casted_attributes)) { |
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256
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// Handle JSON field types |
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5 |
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$jsonCastables = ['array', 'object', 'json']; |
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5 |
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$fieldCasting = $casted_attributes[$field['name']]; |
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260
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5 |
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if (in_array($fieldCasting, $jsonCastables) && isset($data[$field['name']]) && ! empty($data[$field['name']]) && ! is_array($data[$field['name']])) { |
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try { |
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$data[$field['name']] = json_decode($data[$field['name']]); |
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} catch (\Exception $e) { |
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$data[$field['name']] = []; |
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} |
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} |
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} |
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268
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} |
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269
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270
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5 |
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return $data; |
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271
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} |
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272
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273
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/** |
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274
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* @return array |
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275
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*/ |
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276
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12 |
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public function getCurrentFields() |
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277
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{ |
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278
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12 |
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if ($this->entry) { |
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279
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1 |
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return $this->getUpdateFields($this->entry->getKey()); |
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280
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} |
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281
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282
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11 |
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return $this->getCreateFields(); |
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283
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} |
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284
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285
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/** |
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286
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* Order the CRUD fields in the given form. If certain fields are missing from the given order array, they will be |
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287
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* pushed to the new fields array in the original order. |
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288
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* |
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289
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* @param array $order An array of field names in the desired order. |
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290
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* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. |
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291
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*/ |
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292
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7 |
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public function orderFields($order, $form = 'both') |
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293
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{ |
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294
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$this->transformFields($form, function ($fields) use ($order) { |
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295
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7 |
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return $this->applyOrderToFields($fields, $order); |
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296
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7 |
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}); |
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297
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7 |
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} |
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298
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299
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/** |
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300
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* Apply the given order to the fields and return the new array. |
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301
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* |
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302
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* @param array $fields The fields array. |
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303
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* @param array $order The desired field order array. |
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304
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* |
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305
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* @return array The ordered fields array. |
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306
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*/ |
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307
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7 |
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private function applyOrderToFields($fields, $order) |
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308
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{ |
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309
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7 |
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$orderedFields = []; |
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310
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7 |
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foreach ($order as $fieldName) { |
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311
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6 |
|
if (array_key_exists($fieldName, $fields)) { |
|
312
|
5 |
|
$orderedFields[$fieldName] = $fields[$fieldName]; |
|
313
|
|
|
} |
|
314
|
|
|
} |
|
315
|
|
|
|
|
316
|
7 |
|
if (empty($orderedFields)) { |
|
317
|
2 |
|
return $fields; |
|
318
|
|
|
} |
|
319
|
|
|
|
|
320
|
5 |
|
$remaining = array_diff_key($fields, $orderedFields); |
|
321
|
|
|
|
|
322
|
5 |
|
return array_merge($orderedFields, $remaining); |
|
323
|
|
|
} |
|
324
|
|
|
|
|
325
|
|
|
/** |
|
326
|
|
|
* Set the order of the CRUD fields. |
|
327
|
|
|
* |
|
328
|
|
|
* @param array $fields Fields order. |
|
329
|
|
|
* |
|
330
|
|
|
* @deprecated This method was not and will not be implemented since its a duplicate of the orderFields method. |
|
331
|
|
|
* @see Fields::orderFields() to order the CRUD fields. |
|
332
|
|
|
*/ |
|
333
|
|
|
public function setFieldOrder($fields) |
|
|
|
|
|
|
334
|
|
|
{ |
|
335
|
|
|
// not implemented |
|
336
|
|
|
} |
|
337
|
|
|
|
|
338
|
|
|
/** |
|
339
|
|
|
* Set the order of the CRUD fields. |
|
340
|
|
|
* |
|
341
|
|
|
* @param array $fields Fields order. |
|
342
|
|
|
* |
|
343
|
|
|
* @deprecated This method was not and will not be implemented since its a duplicate of the orderFields method. |
|
344
|
|
|
* @see Fields::orderFields() to order the CRUD fields. |
|
345
|
|
|
*/ |
|
346
|
|
|
public function setFieldsOrder($fields) |
|
347
|
|
|
{ |
|
348
|
|
|
$this->setFieldOrder($fields); |
|
|
|
|
|
|
349
|
|
|
} |
|
350
|
|
|
|
|
351
|
|
|
/** |
|
352
|
|
|
* Apply the given callback to the form fields. |
|
353
|
|
|
* |
|
354
|
|
|
* @param string $form The CRUD form. Can be 'create', 'update' or 'both'. |
|
355
|
|
|
* @param callable $callback The callback function to run for the given form fields. |
|
356
|
|
|
*/ |
|
357
|
67 |
|
private function transformFields($form, callable $callback) |
|
358
|
|
|
{ |
|
359
|
67 |
|
switch (strtolower($form)) { |
|
360
|
67 |
|
case 'create': |
|
361
|
14 |
|
$this->create_fields = $callback($this->create_fields); |
|
362
|
14 |
|
break; |
|
363
|
|
|
|
|
364
|
59 |
|
case 'update': |
|
365
|
15 |
|
$this->update_fields = $callback($this->update_fields); |
|
366
|
15 |
|
break; |
|
367
|
|
|
|
|
368
|
|
|
default: |
|
369
|
50 |
|
$this->create_fields = $callback($this->create_fields); |
|
370
|
50 |
|
$this->update_fields = $callback($this->update_fields); |
|
371
|
50 |
|
break; |
|
372
|
|
|
} |
|
373
|
67 |
|
} |
|
374
|
|
|
} |
|
375
|
|
|
|
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.