o ןi4@sddlZddlZddlZddlZddlmZddlmZddlm Z ddl m Z ddl m Z ddlmZGd d d ZGd d d eZGd ddeZdS)N)apps) OutputWrapper) NOT_PROVIDED)timezone)get_docs_version)MigrationLoaderc@sZeZdZdZdddZddZddZd d Zd d Zd dZ ddZ 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|_|p t|_||_dSN)defaultssetspecified_appsdry_run)selfr r rriC:\Users\psant\Downloads\Anu Raj Backend\school\venv\Lib\site-packages\django/db/migrations/questioner.py__init__s   zMigrationQuestioner.__init__cCs||jvrdSzt|}Wnty|jddYSwt|j\}}|dur2|jddSzt |}Wnt yI|jddYSwt |ddr[t t j|j}nt|drst|jdkridSt t|jd}td d |D S) z2Should we create an initial migration for the app?T ask_initialFN__file____path__rrcss"|] }|dkr|dVqdS)z __init__.pyz.pyN)endswith).0xrrr 7s z2MigrationQuestioner.ask_initial..)r rZget_app_config LookupErrorr getrmigrations_modulelabel importlib import_module ImportErrorgetattroslistdirpathdirnamerhasattrlenrlistany)r app_labelZ app_configZmigrations_import_path_r filenamesrrrrs,     zMigrationQuestioner.ask_initialcCdS)#Adding a NOT NULL field to a model.Nrr field_name model_namerrrask_not_null_addition9z)MigrationQuestioner.ask_not_null_additioncCr-)"Changing a NULL field to NOT NULL.Nrr/rrrask_not_null_alteration>r3z+MigrationQuestioner.ask_not_null_alterationcC|jddS)Was this field really renamed? ask_renameFNr r)rr1old_namenew_namefield_instancerrrr8CzMigrationQuestioner.ask_renamecCr6)Was this model really renamed?ask_rename_modelFNr9)rold_model_statenew_model_staterrrr?Gr=z$MigrationQuestioner.ask_rename_modelcCr6)z)Should these migrations really be merged? ask_mergeFNr9rr*rrrrBKr=zMigrationQuestioner.ask_mergecCr-)(Adding an auto_now_add field to a model.Nrr/rrrask_auto_now_add_additionOr3z-MigrationQuestioner.ask_auto_now_add_additioncCr-).Adding a unique field with a callable default.Nrr/rrr$ask_unique_callable_default_additionTr3z8MigrationQuestioner.ask_unique_callable_default_addition)NNN) __name__ __module__ __qualname____doc__rrr2r5r8r?rBrErGrrrrr s  r csteZdZ dfdd ZdddZddZdd d Zd d Zd dZddZ ddZ ddZ ddZ ddZ ZS)InteractiveMigrationQuestionerNcs&tj|||d|pttj|_dSN)r r r)superrrsysstdout prompt_output)rr r rrQ __class__rrr[sz'InteractiveMigrationQuestioner.__init__cCsz|jj|dddt}|s|dur|S|r |ddvr5|jjdddt}|r |ddvs |ddkS)N endingrZynzPlease answer yes or no: y)rQwriteinputlower)rquestiondefaultresultrrr_boolean_inputcs z-InteractiveMigrationQuestioner._boolean_inputcCs|j|t|D]\}}|jd|d|fq |jjdddt} zt|}Wn ty7Ynwd|krEt|krF|S|jjdddt}q() Nz %s) %srzSelect an option: rUrVTrzPlease select a valid option: )rQrY enumeraterZint ValueErrorr')rr\choicesichoicer^valuerrr _choice_inputms"  z,InteractiveMigrationQuestioner._choice_inputrUc Cs|jd|r|jd|d|jd|jd |r'd|}nd}|jj|d d t}|s:|r:|}|sC|jd n1|d krMtd n'z t|ittdWSt t fys}z|jd|WYd}~nd}~wwq)z Prompt for a default value. The ``default`` argument allows providing a custom default value (as a string) which will be shown to the user and used as the return value if the user doesn't provide any other input. z/Please enter the default value as valid Python.zAccept the default 'z/' by pressing 'Enter' or provide another value.zxThe datetime and django.utils.timezone modules are available, so it is possible to provide e.g. timezone.now as a value.zType 'exit' to exit this promptTz[default: {}] >>> z>>> rUrVz;Please enter some code, or 'exit' (without quotes) to exit.exitr)datetimerzInvalid input: %sN) rQrYformatrZrOrhevalrir SyntaxError NameError)rr]promptcodeerrr _ask_default~s<     z+InteractiveMigrationQuestioner._ask_defaultcCsF|js!|d|d|dddg}|dkrtddS|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. 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