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python Programming Glossary: foreignTo make a plan for my first MySQL project http://stackoverflow.com/questions/1168701/to-make-a-plan-for-my-first-mysql-project the right way in designing databases to get primary and foreign keys right in ERD to understand login variable in cookies URL..
Can “list_display” in a Django ModelAdmin display attributes of ForeignKey fields? http://stackoverflow.com/questions/163823/can-list-display-in-a-django-modeladmin-display-attributes-of-foreignkey-field of ForeignKey fields I have a Person model that has a foreign key relationship to Book. Book has a number of fields but I'm..
What is the best approach to change primary keys in an existing Django app? http://stackoverflow.com/questions/2055784/what-is-the-best-approach-to-change-primary-keys-in-an-existing-django-app with FK's that change will have to locate the row in the foreign table and update their FK reference. Alternative. Rename all..
Django Query That Get Most Recent Objects From Different Categories http://stackoverflow.com/questions/2074514/django-query-that-get-most-recent-objects-from-different-categories I have two models A and B. All B objects have a foreign key to an A object. Given a set of A objects is there anyway..
Sqlite / SQLAlchemy: how to enforce Foreign Keys? http://stackoverflow.com/questions/2614984/sqlite-sqlalchemy-how-to-enforce-foreign-keys on for each database connection separately sqlite PRAGMA foreign_keys ON I am using SQLAlchemy how can I make sure this always.. 'sqlite memory ' echo True engine.execute 'pragma foreign_keys on' ...but it is not working ...What am I missing EDIT.. out which .exe it's using and change it python sqlite foreign keys sqlalchemy share improve this question I now have this..
http://stackoverflow.com/questions/3224268/python-unicode-encode-error the contents of the XML and you can't because theres some foreign Unicode characters. Try to encode your unicode string as ascii..
Python and character normalization http://stackoverflow.com/questions/4162603/python-and-character-normalization Hello I retrieve text based utf8 data from a foreign source which contains special chars such as u Δ±ΓΆΓΌΓ§ while I want..
Django: multiple models in one template using forms http://stackoverflow.com/questions/569468/django-multiple-models-in-one-template-using-forms the parent model before dependant and use parent's ID for foreign key before commiting save of child model. The link has the demo... which may be optionally tied to another model models by foreign keys. However there seem to be no default option for entering..
Complex foreign key constraint in SQLAlchemy http://stackoverflow.com/questions/8394177/complex-foreign-key-constraint-in-sqlalchemy foreign key constraint in SQLAlchemy I have two tables SystemVariables.. choices for all of the variables. VariableOptions has a foreign key variable_id which states which variable it is an option.. which variable it is an option for. SystemVariables has a foreign key choice_id which states which option is the currently selected..
Why is the same SQLite query being 30 times slower when fetching only twice as many results? http://stackoverflow.com/questions/10531898/why-is-the-same-sqlite-query-being-30-times-slower-when-fetching-only-twice-as-m INT NOT NULL CONSTRAINT `fk_feature_msrun1` FOREIGN KEY `msrun_msrun_id` REFERENCES `msrun` `msrun_id` ON DELETE.. INT NOT NULL CONSTRAINT `fk_spectrum_msrun1` FOREIGN KEY `msrun_msrun_id` REFERENCES `msrun` `msrun_id` ON DELETE.. NOT NULL CONSTRAINT `fk_spectrum_has_feature_spectrum1` FOREIGN KEY `MSMS_precursor_precursor_id` REFERENCES `MSMS_precursor`..
How to model a contract database (with several buyers or sellers) using GAE datastore http://stackoverflow.com/questions/11294526/how-to-model-a-contract-database-with-several-buyers-or-sellers-using-gae-data CREATE TABLE contractingParties FK_id INTEGER 7 NOT NULL FOREIGN KEY FK_id references people id FK_idContract INTEGER 7 NOT NULL.. references people id FK_idContract INTEGER 7 NOT NULL FOREIGN KEY FK_idContract references contracts idContract condition..
Error: AttributeError: Transaction instance has no attribute 'trans_handle' http://stackoverflow.com/questions/12781696/error-attributeerror-transaction-instance-has-no-attribute-trans-handle in nametable 'constraints' if nameconstraint 'constrtype' 'FOREIGN' s '' s 'ALTER TABLE ' nametable 'inform_about_table' 'name'.. ' n' s ' ' 'ADD CONSTRAINT ' nameconstraint 'name' ' FOREIGN KEY ' for namefield in nameconstraint 'items' if namefield.count..
SQLAlchemy ForeignKey relation via an intermediate table http://stackoverflow.com/questions/2234030/sqlalchemy-foreignkey-relation-via-an-intermediate-table ArticleProperties with property_name category are actually FOREIGN KEYS of table Articles to table Categories This is a complicated..
Django ForeignKey which does not require referential integrity? http://stackoverflow.com/questions/3558907/django-foreignkey-which-does-not-require-referential-integrity and creating the column without actually declaring it as a FOREIGN KEY. That way you'll get o.obj_id o.obj will work if the object..
Complex foreign key constraint in SQLAlchemy http://stackoverflow.com/questions/8394177/complex-foreign-key-constraint-in-sqlalchemy ADD CONSTRAINT systemvariables_choice_id_fk FOREIGN KEY choice_id variable_id REFERENCES variableoptions option_id.. ADD CONSTRAINT systemvariables_choice_id_fk FOREIGN KEY choice_id variable_id REFERENCES variableoptions option_id..
Django or similar for composite primary keys http://stackoverflow.com/questions/1624257/django-or-similar-for-composite-primary-keys each is unique. Also in this case P N rev should be a ForeignKey of Table one. python django web applications django models.. and place a unique index on your domain composite key. Foreign keys will then refer to the surrogate primary key column. share..
Sqlite / SQLAlchemy: how to enforce Foreign Keys? http://stackoverflow.com/questions/2614984/sqlite-sqlalchemy-how-to-enforce-foreign-keys SQLAlchemy how to enforce Foreign Keys The new version of SQLite has the ability to enforce Foreign.. Keys The new version of SQLite has the ability to enforce Foreign Key constraints but for the sake of backwards compatibility.. from sqlalchemy.interfaces import PoolListener class ForeignKeysListener PoolListener def connect self dbapi_con con_record..
How to use NumPy array with ctypes? http://stackoverflow.com/questions/3195660/how-to-use-numpy-array-with-ctypes as NumPy arrays and things I didn't understand C Types Foreign Function Interface numpy.ctypeslib update corrected a mistake..
How does Django's ORM manage to fetch Foreign objects when they are accessed http://stackoverflow.com/questions/3597762/how-does-djangos-orm-manage-to-fetch-foreign-objects-when-they-are-accessed does Django's ORM manage to fetch Foreign objects when they are accessed Been trying to figure this out.. have gotten nowhere. class other models.Model user models.ForeignKey User others other.objects.all o others 0 At this point the.. it is simply assigned to the class using setattr . Since ForeignKey is a Django model field it defines contribute_to_class ...
Django models.py Circular Foreign Key http://stackoverflow.com/questions/3682513/django-models-py-circular-foreign-key models.py Circular Foreign Key I have a django app which basically is just a photo album... models import os class Album models.Model thumb models.ForeignKey Image null True blank True class Image models.Model image.. upload_to 't_pics images thumbs' album models.ForeignKey Album Error I get when I do manage.py sqlall appname .....
SQLAlchemy classes across files http://stackoverflow.com/questions/7478403/sqlalchemy-classes-across-files B id Column Integer primary_key True A_id Column Integer ForeignKey A.id C.py from sqlalchemy import from main import Base class.. C id Column Integer primary_key True A_id Column Integer ForeignKey A.id And then say we have a main.py something like this from.. gives the error sqlalchemy.exc.NoReferencedTableError Foreign key assocated with column 'C.A_id' could not find table 'A'..
http://stackoverflow.com/questions/7933596/django-dynamic-model-fields data itself but metadata about the fields. site models.ForeignKey Site default settings.SITE_ID name models.CharField max_length.. class Meta abstract True Note how CustomDataField has a ForeignKey to Site each Site will have a different set of custom data.. UserCustomDataValue CustomDataValue custom_field models.ForeignKey UserCustomDataField user models.ForeignKey User related_name..
Django ORM: Selecting related set http://stackoverflow.com/questions/853184/django-orm-selecting-related-set max_length 64 ... class Choice models.Model poll models.ForeignKey Poll ... Given a Poll object I can query its choices with.. which solves a similar problem but for the case of Generic Foreign Keys not reverse relations. It wouldn't be too hard to combine..
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