| 1 | <?php  | 
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| 3 | class DMSDocumentCartSubmissionItem extends DataObject  | 
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| 4 | { | 
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| 5 | private static $db = array(  | 
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| 6 | 'Quantity' => 'Int',  | 
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| 7 | );  | 
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| 8 | |||
| 9 | private static $has_one = array(  | 
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| 10 | 'Document' => 'DMSDocument',  | 
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| 11 | 'DMSDocumentCartSubmission' => 'DMSDocumentCartSubmission',  | 
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| 12 | );  | 
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| 13 | |||
| 14 | private static $summary_fields = array(  | 
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| 15 | 'Document.getTitle' => 'Document',  | 
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| 16 | 'Quantity' => 'Quantity'  | 
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| 17 | );  | 
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| 18 | |||
| 19 | private static $singular_name = 'Submission Item';  | 
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| 20 | private static $plural_name = 'Submission Items';  | 
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| 21 | |||
| 22 | public function getCMSFields()  | 
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| 28 | }  | 
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| 29 | 
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.