1 | <?php |
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21 | trait CountAttributeTrait |
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22 | { |
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23 | /** |
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24 | * Returns the aggregate value of a field. |
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25 | * |
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26 | * @param string $field |
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27 | * |
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28 | * @return int |
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29 | */ |
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30 | 8 | protected function getCountAttribute($field) |
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31 | { |
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32 | // if relation is not loaded already, let's do it first |
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33 | 8 | if (!array_key_exists($field, $this->relations)) { |
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34 | $this->load($field); |
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35 | } |
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36 | |||
37 | 8 | $related = $this->getRelation($field); |
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38 | |||
39 | // then return the count directly |
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40 | 8 | return ($related) ? (int) $related->aggregate : 0; |
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41 | } |
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42 | |||
43 | /** |
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44 | * Eager load relations on the model. |
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45 | * |
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46 | * @param array|string $relations |
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47 | * |
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48 | * @return $this |
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49 | */ |
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50 | abstract public function load($relations); |
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51 | |||
52 | /** |
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53 | * Get a specified relationship. |
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54 | * |
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55 | * @param string $relation |
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56 | * |
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57 | * @return mixed |
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58 | */ |
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59 | abstract public function getRelation($relation); |
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60 | } |
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61 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: