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41 mjordaan 1 
<?php namespace ProcessWire;
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/**
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 * Loads file/image fields to ensure their schema is up-to-date and avoid an error message
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 *
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 *
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 */
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class SystemUpdate18 extends SystemUpdate {
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	public function execute() {
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		$this->wire()->addHookAfter('ProcessWire::ready', $this, 'executeAtReady');
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		return 0; // indicates we will update system version ourselves when ready
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	}
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	public function executeAtReady() {
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		foreach($this->wire()->fields as $field) {
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			if($field->type instanceof FieldtypeFile) {
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				try {
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					$field->type->getDatabaseSchema($field);
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				} catch(\Exception $e) { }
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			}
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		}
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		$this->updater->saveSystemVersion(18);
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	}
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}
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