Opened 6 years ago. Closed 4 years ago. Last modified 4 years ago. On my primary development system Intel i7 quad core with SSD drivesit takes nearly 20 minutes to get from executing runtests.
No fixture named 'X' found
Set as release blocker because this is an order of magnitude performance regression added by new functionality. You didn't mention the database on which you encounter this problem, default SQLite?
It would be nice to track a bit further what is so slow inside loaddata. I'd guess the slowness might be the transaction. Not a release blocker, I'm afraid; at this point release blocker is reserved for bugs that either crash Django or remove features that previously existed. I'm not willing to delay the 1.
Notably, the code in question has not been touched by migrations; we do a dumpdata as part ofbut that doesn't seem to be part of this. I'm not sure what the cause of the regression could be.
As far as we could figure out, the problem was not transaction management per se, but the handling of constraints: For loaddata to avoid complex and sometimes non-satisfiable ordering requirements, it needs FK constraints to be deferred while it works.
On core databases, each for its own reasons, this is not an issue. SQL Server does not support defering in the normal sense -- what you need to do is turn the constraints off in the beginning of worlk and back on in the end. I don't remember if this is an operation you can do within a transaction, but for sure it is not tied to a transaction -- you can turn the constraints off and then run several transactions before turning them back on.
SQL Server does not -- perhaps, given the semantics, cannot -- keep track of data changed while constraints were off.Load initial data into Django tables
We had a project with several dozen apps, and relatively simple sets of migrations on a full database for upgrades would take minutes on Oracle and hours on SQL Server. Then we told SQL Server users to use migrate --all --no-initial-data we didn't have any initial data anywhereand sanity returned. I'm not sure what this implies with regards to a solution. Some of the problem should go away if loaddata only defered constraints when initial data actually existed.
Perhaps there's a way to avoid the check in most cases say, most data loaded in the Django test suite can be given a free ticket because it is verified by the other backends. I have an application in 1. I have about 75 migrations. When I run.
I ran my tests in an old environment at 1. I ran "pip install django --upgrade" and re-ran the tests. It took 30 seconds to create the test database. I don't know if my issue is the same as this issue being as I'm not using MSSQL Serverbut I'd just like to add that there appears to be a significant slow down when going from 1. I'm using "django.
Robert, when you run your tests in 1. The performance of that will be improved in 1. Also, we might add an option to disable migrations when testing in the future. But ultimately, no, I don't think your issue is the one tracked by this ticket.Proxmox export qcow2
If this is related to the performance of the migration operations - which doesn't seem to be completely clear at this point - the issue should be fixed or at leased reduced by an order of magnitude by the optimizations the migrate process received for 1. I'm closing this with needsinfo for the reasons posted in comment I wonder if this might be better on master 1.
I'm not particularly proud of that hack, but it seems worthwhile unless someone can spot a problem with it. The idea is to skip disabling constraints when no fixture files are found in loaddata.
The 1.Opened 11 years ago. Closed 8 years ago. When there is an error in a fixture being loaded by the command loaddata it prints an error description into stderr and them simple return.
I think it would be better to raise a CommandError instead of simple exiting the handle method. My reasons are:. Download all attachments as:. This is a backwards-incompatible change, so we need a very good reason to make this change. I'm not sure your reasons get that far, but I'll leave this open for some more discussion.
What harm could do this patch to users other than alerting them that they used to have bad fixtures and now they know it? The only real difference this patch introduces is that loaddata stops trying to load fixtures as soon as one of them is rotten. I think this is a good thing since the previous behaviour could hide obscure bugs in your data.
I noticed what is likely a related problem.Ford 312 stroker kit
When the loaddata command is used with the auto-generated manage. Only when the verbosity level is increased from 0 to 2 is an error reported, and the return code still indicates success:. Typically, silence implies successful completion. This problem is particularly troublesome because the syntax for loaddata differs significantly from that of dumpdata. See also related issue in Marking this one a duplicate of that.
Reopening, as the fix for did not, eventually, fix this issue. In trunk as of rev the exit status of a failed loaddata invocation e. So, the only beneficial IMHO change the modification proposed by this ticket would introduce would be that the Unix process exit code changes from zero to a non-zero value.
I suspect the backward-incompatibility reservations Jacob had back then were related to the fact that raising CommandError would mean exiting from the nested loops and aborting execution of the command; but the evolution of the code during the last three years has resulted in precisely that behavior already. I've just hit this. We have a buildbot and when the loaddata fails, we cannot easily detect it.Allwinner a33 cm2
So, having run "set -e" in my bash doesn't help in this case, and then tests are run. The tests fail and the error was that loaddata failed, very hidden in the output. If the exit code of the command could be just like any standard unix command! When will be committed, we should be able to easily make a clean patch for this one. In [6fda4e29c1b5edadbead51] :.
Fixed -- Raised CommandError when errors happen in loaddata. Django is a registered trademark of the Django Software Foundation. Django The web framework for perfectionists with deadlines.
Opened 11 years ago Closed 8 years ago. Description When there is an error in a fixture being loaded by the command loaddata it prints an error description into stderr and them simple return.Since version 0. To demonstrate, we create a few Competency objects beforehand in a manage.
Here are the various ways of doing natural key relations from JobPosting fixtures to those pre-existing Competency objects:. As with normal primary key-based relations, foreign keys accept a single natural key tuple, whereas many-to-many fields require an iterable of them, even with a single item.
Instead, it uses DeserializedObjecta container class for pre-saved deserialized data, found in django. Raw mode will prevent this, however. Once a fixture module containing those fixtures is loaded, we can check to see that in raw mode, Sadie was spared the humiliation:. If you have a compelling argument why raw mode should be on by default, do tell.
Also, check out the note in Differences in the output of loaddata below for a possible minor caveat associated with custom database routers. The various forms of specifying fixtures for loading are detailed in this example of TestCase. Strings with dots such as "other. If found, it alone gets loaded and any further searches are not made on that name. If not found, a FixtureUsageError exception is raised. Raising an exception may seem harsh, when one could just pass the string on for Django to handle, but I wanted to make references to appname.
This means that any traditional fixture files that start with an app name followed by a dot, like bandaid.
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Arbitrary strings with no dots such as "something" are first checked against app names. If a match is found, no further determination takes place.
All the fixture modules but no traditional fixtures of that app are loaded. This shadows both "something.Puchong knock door
In this scenario, "something. Remember: explicit is better than implicit. In addition, it is checked against the names of fixture modules in all valid fixture module locations.
All matches are marked for loading in whatever order they are found but always after Django has taken a crack at locating and loading traditional fixture files with that name first.
That means you can have as many fixture modules called "something. You can also have something. No shadowing takes place at this stage. That is, if the parameters to loaddata include "something. The outputs from those two runs are stored and parsed for the loaded fixture counts.
Those counts are then combined with the counts produced by any class-based fixtures.Posted by: admin December 18, Leave a comment.
I converted them to be loaded with migrations rather than automatically by Django as this is recommended in the documentation. I was using version 0. I saw that the newest version 0. South simply patches syncdb to skip the fixture loading for models with migrations, and actually loads them after the final migration for an app has been run.
By default, Django looks in the fixtures directory inside each app for fixtures. Django 1. These have an interface similar to South; management commands to create migrations makemigrationsrun them migrateand others. This is mentioned in the release notes. The docs now recomend to create a datamigration to handle fixture loading. If you had only the initial migration, you end up with these files note that I renamed migration for clarity :.
Try using the path to the json file, as manage. Try something like this:. December 31, Django Leave a comment. Questions: I have models with many to many relationships like this: class Contact models. TextField class Mail models. Questions: I am writing a Django application that has a model for People, and I have hit a snag.
Add menu. No fixture named 'X' found Posted by: admin December 18, Leave a comment. South and fixtures South simply patches syncdb to skip the fixture loading for models with migrations, and actually loads them after the final migration for an app has been run.
To quote the docs: By default, Django looks in the fixtures directory inside each app for fixtures. Logical or of Django many to many queries returns duplicate results December 31, Django Leave a comment Questions: I have models with many to many relationships like this: class Contact models. Django model field choices — wouldn't a dict be better?
Django: Order a model by a many-to-many field December 31, Django Leave a comment Questions: I am writing a Django application that has a model for People, and I have hit a snag.South simply patches syncdb to skip the fixture loading for models with migrations, and actually loads them after the final migration for an app has been run.
By default, Django looks in the fixtures directory inside each app for fixtures. This means that if you have an app called "myapp", you'd create a "fixtures" dir inside it and place the json there, e. Django 1. These have an interface similar to South; management commands to create migrations makemigrationsrun them migrateand others.
This is mentioned in the release notes. The docs now recomend to create a datamigration to handle fixture loading. Luckily, this is pretty easy to do, here's how I usually do it:.Flagpoling questions
If you had only the initial migration, you end up with these files note that I renamed migration for clarity :. I'm using Django 1. I converted them to be loaded with migrations rather than automatically by Django as this is recommended in the documentation. I was using version 0. I saw that the newest version 0. Try using the path to the json file, as manage. Try something like this:. To quote the docs: By default, Django looks in the fixtures directory inside each app for fixtures.
Luckily, this is pretty easy to do, here's how I usually do it: 1. I converted them to be loaded with migrations rather than automatically by Django as this is recommended in the documentation I was using version 0. Now I get the following error on all the migration that load fixtures: UserWarning : No fixture named 'X' found.
When I use Django's loaddata it works fine.
Any ideas on how to solve this? If your still getting the error: No fixture named 'X' found Try using the path to the json file, as manage. Why don't you run loaddata comand from your migration then?Following command will dump the whole database with out including auth. By default, dumpdata will output all data on a single line. You can use the --indent option to pretty-print the output with a number of indentation spaces.
When you backup whole database by using dumpdata command, it will backup all the database tables. If you use this database dump to load the fresh database in another django projectit can be causes IntegrityError If you loaddata in same database it works fine. To fix this problem, make sure to backup the database by excluding contenttypes and auth.
Thanks for this tutorial. The steps worked for me, but I found that when I tried to restore, I got an out of memory error, because my file was too large. I ended up using raw postgres commands:.
There is lots of other cases where loaddata and dumpdata commands don't work. Hi, thanks for this post. I was able to use it to save some dats into json but when I tried to load same data into the db, I got the error:.
This is awesome. For some reason I actually got my Webfaction Django to accept fixtures. Def bookmark on this exact page! Good article. September 09, Last Updated: September 09, Django dumpdata and loaddata django database model dumpdata. Written by eranga bandara. January 16, March 20, January 14, Thank you very much! Paragraph "Restore fresh database" saved me! July 15, I was able to use it to save some dats into json but when I tried to load same data into the db, I got the error: raise base.
WithData e, d['model'], d. July 23, October 05, March 15, Thanks so much, this save me from slot of trouble.In the first two posts of this serieswe talked about how to get the basic infrastructure for your tests up and running. You should have a file with doc tests and one with unit tests.
If you were feeling adventurous you may have even added some real content to them. This post will cover fixtures. Fixtures are how you create a state for your database in your tests.
This will be my first post in the comparison between unit tests and doc tests. I will focus on fixtures, but some other differences between the two may become relevant throughout the post, and I will address them in turn.
This makes all of your test data self contained inside your app, so it can be run when it is distributed. Before we go about trying to figure out how to use fixtures, we need to know how to make them. Basically if you have an app that has data in the database, you can use the.
My preferred command is:. This makes for a really nice, readable fixture, so if you need to edit it later you can. Go ahead and run this command in your project directory, substituting your app in the appropriate places. Open the fixture if you want and take a peak inside. It should be a nice readable version of your database, serialized into Yaml. If not, you can remove the format option and it will default to JSON.
Django also comes with a really neat tool to be able to test and update fixtures. The testserver command allows you to run the development server, passing a fixture to load before it launches. This allows you to run your code base against the fixture that you have, in a browser. This seems really nice, but the killer feature of this command is that it keeps the database around after you kill the development server.
This means that you can load up a fixture, edit it in the admin or frontend, and then kill the server; then run dumpdata against that database and get your updated fixture back out.
Pretty neat! This is the one you want to get data out of. You may have to define it in your settings. This seems like a little bit of a hack, and maybe something could be done to make this easier. In what will become a recurring trend, doing fixtures in doc tests is a hack. So a lot of the functionality that we get for free with unit tests, has to be hacked into doc tests. In this snippet you are basically calling it the way it is called within Django. Normally when you are using loaddata, you would be calling it as.
Note that the loaddata docs talk about how to use loaddata normally. There are a couple of downsides to this method; The test is very fragile, if the fixture breaks, all of your tests fail.
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Also, you can really only call one fixture at a time because there is no setUp and tearDown that will make sure your environment is the same for every test. Doing things this way just makes writing tests a whole lot harder. Generally in doc tests, you would create your content as if you were on the command line. This shows how doc tests are generally limited in their scope.
You go ahead and create the objects that you care about in the test explicitly, and then run your tests against them. A simple example:. This tests creating, retrieving and deleting an object.
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