U 5i&@sddlZddlZddlZddlZddlmZddlmZddlm Z ddl m Z GdddZ Gd d d e Z Gd d d e ZdS) N)apps NOT_PROVIDED)timezone)MigrationLoaderc@sReZdZdZdddZddZddZd d Zd d Zd dZ ddZ ddZ dS)MigrationQuestionerz Give the autodetector responses to questions it might have. This base class has a built-in noninteractive mode, but the interactive subclass is what the command-line arguments will use. NcCs |pi|_|pt|_||_dSN)defaultssetspecified_appsdry_run)selfr r r rC/tmp/pip-unpacked-wheel-gcyiijx6/django/db/migrations/questioner.py__init__s  zMigrationQuestioner.__init__cCs||jkrdSzt|}Wn"tk r>|jddYSXt|j\}}|dkrf|jddSzt |}Wn"t k r|jddYSXt |ddrt t j|j}n0t|drt|jdkrdSt t|jd}td d |D SdS) z2Should we create an initial migration for the app?T ask_initialFN__file____path__rrcss |]}|dkr|dVqdS)z __init__.pyz.pyN)endswith).0xrrr 5sz2MigrationQuestioner.ask_initial..)r rZget_app_config LookupErrorr getrmigrations_modulelabel importlib import_module ImportErrorgetattroslistdirpathdirnamerhasattrlenrlistany)r app_labelZ app_configZmigrations_import_path_r filenamesrrrrs(   zMigrationQuestioner.ask_initialcCsdS)#Adding a NOT NULL field to a model.Nrr field_name model_namerrrask_not_null_addition7sz)MigrationQuestioner.ask_not_null_additioncCsdS)"Changing a NULL field to NOT NULL.Nrr-rrrask_not_null_alteration<sz+MigrationQuestioner.ask_not_null_alterationcCs|jddS)Was this field really renamed? ask_renameFr r)rr/old_namenew_namefield_instancerrrr4AszMigrationQuestioner.ask_renamecCs|jddS)Was this model really renamed?ask_rename_modelFr5)rold_model_statenew_model_staterrrr:Esz$MigrationQuestioner.ask_rename_modelcCs|jddS)z)Should these migrations really be merged? ask_mergeFr5rr)rrrr=IszMigrationQuestioner.ask_mergecCsdS)(Adding an auto_now_add field to a model.Nrr-rrrask_auto_now_add_additionMsz-MigrationQuestioner.ask_auto_now_add_addition)NNN) __name__ __module__ __qualname____doc__rrr0r2r4r:r=r@rrrrr s rc@sXeZdZdddZddZdddZd d Zd d Zd dZddZ ddZ ddZ dS)InteractiveMigrationQuestionerNcCsJtd|}|s|dk r|S|r0|ddkr:td}q|ddkS)Nz%s rZynzPlease answer yes or no: y)inputlower)rquestiondefaultresultrrr_boolean_inputUs    z-InteractiveMigrationQuestioner._boolean_inputcCst|t|D]\}}td|d|fqtd}z t|}Wntk rVYn"Xd|krpt|krxnn|Std}q6dS)Nz %s) %srzSelect an option: rzPlease select a valid option: )print enumeraterGint ValueErrorr&)rrIchoicesichoicerKvaluerrr _choice_input]s z,InteractiveMigrationQuestioner._choice_inputc Cstd|rtd|dtdtd|r>> z>>> z;Please enter some code, or 'exit' (without quotes) to exit.exitr)datetimerzInvalid input: %sN) rMformatrGsysrWevalrXr SyntaxError NameError)rrJpromptcodeerrr _ask_defaultls.    z+InteractiveMigrationQuestioner._ask_defaultcCsD|js@|d|d|dddg}|dkr8tdn|SdS) r,z.It is impossible to add a non-nullable field 'z' to z{ without specifying a default. This is because the database needs something to populate existing rows. Please select a fix:bProvide a one-off default now (will be set on all existing rows with a null value for this column)6Quit and manually define a default value in models.py.Nr rUrZrWrarr.r/rSrrrr0s  z4InteractiveMigrationQuestioner.ask_not_null_additioncCsR|jsN|d|d|ddddg}|dkr2tS|dkrFtdn|Sd S) r1z-It is impossible to change a nullable field 'z' on z to non-nullable without providing a default. This is because the database needs something to populate existing rows. Please select a fix:rbzIgnore for now. Existing rows that contain NULL values will have to be handled manually, for example with a RunPython or RunSQL operation.rcrdreN)r rUrrZrWrargrrrr2s z6InteractiveMigrationQuestioner.ask_not_null_alterationcCs"d}|||||||jjfdS)r3z(Was %s.%s renamed to %s.%s (a %s)? [y/N]F)rL __class__rA)rr/r6r7r8msgrrrr4s z)InteractiveMigrationQuestioner.ask_renamecCs d}|||j|j|jfdS)r9z(Was the model %s.%s renamed to %s? [y/N]F)rLr)name)rr;r<rirrrr:s z/InteractiveMigrationQuestioner.ask_rename_modelcCs |ddS)Nz Merging will only work if the operations printed above do not conflict with each other (working on different fields or models) Should these migration branches be merged? [y/N]F)rLr>rrrr=sz(InteractiveMigrationQuestioner.ask_mergecCsH|jsD|d|d|dddg}|dkr8tdn |jdd Sd S) r?z#It is impossible to add the field 'z' with 'auto_now_add=True' to zf without providing a default. This is because the database needs something to populate existing rows. zDProvide a one-off default now which will be set on all existing rowsrcrdrez timezone.now)rJNrfrgrrrr@s   z8InteractiveMigrationQuestioner.ask_auto_now_add_addition)N)rV) rArBrCrLrUrar0r2r4r:r=r@rrrrrESs  %rEc@s$eZdZddZddZddZdS)!NonInteractiveMigrationQuestionercCstddSNrerZrWr-rrrr0sz7NonInteractiveMigrationQuestioner.ask_not_null_additioncCstSr rr-rrrr2sz9NonInteractiveMigrationQuestioner.ask_not_null_alterationcCstddSrlrmr-rrrr@sz;NonInteractiveMigrationQuestioner.ask_auto_now_add_additionN)rArBrCr0r2r@rrrrrksrk)rXrr!rZZ django.appsrZdjango.db.modelsrZ django.utilsrloaderrrrErkrrrrs    F