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MigrationBase.apply()   A
last analyzed

↳ Parent: MigrationBase

Complexity

Conditions 1

Size

Total Lines 5

Duplication

Lines 0
Ratio 0 %
Metric Value
cc 1
dl 0
loc 5
rs 9.4286
1 
import transaction
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class MigrationBase(object):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __init__(self, root):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.root = root

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    @classmethod

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def is_applicable(cls, root):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return getattr(root, '_db_version', 0) < cls.DB_VERSION

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def set_version(self):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.root._db_version = self.DB_VERSION

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    def apply(self):

            


            
                                                        
            
                                    
            
            

                
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        transaction.begin()

            


            
                                                        
            
                                    
            
            

                
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        self.forward()

            


            
                                                        
            
                                    
            
            

                
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        self.set_version()

            


            
                                                        
            
                                    
            
            

                
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        transaction.commit()

            


            
                                                        
            
                                    
            
            

                
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