Django 1 7 - makemigrations not detecting changes

Question

As the title says  I can t seem to get migrations working   The app was originally under 1 6  so I understand that migrations won t be there initially  and indeed if I run python manage py migrate I get   Operations to perform    Synchronize unmigrated apps  myapp   Apply all migrations  admin  contenttypes  auth  sessions Synchronizing apps without migrations    Creating tables      Installing custom SQL      Installing indexes    Running migrations    No migrations to apply    If I make a change to any models in myapp  it still says unmigrated  as expected   But if I run python manage py makemigrations myapp I get   No changes detected in app  myapp    Doesn t seem to matter what or how I run the command  it s never detecting the app as having changes  nor is it adding any migration files to the app   Is there any way to force an app onto migrations and essentially say  This is my base to work with  or anything  Or am I missing something   My database is a PostgreSQL one if that helps at all

User · Accepted Answer

Ok  looks like I missed an obvious step  but posting this in case anyone else does the same   When upgrading to 1 7  my models became unmanaged  managed   False  - I had them as True before but seems it got reverted   Removing that line  To default to True  and then running makemigrations immediately made a migration module and now it s working  makemigrations will not work on unmanaged tables  Which is obvious in hindsight

User · Answer

Just in case you have a specific field that does not get identified by makemigrations  check twice if you have a property with the same name   example   field   django db models CharField max length 10  default       blank True  null True         later   property def field self       pass   the property will  overwrite  the field definition so changes will not get identified by makemigrations

User · Answer

This may happen due to the following reasons    You did not add the app in INSTALLED APPS list in settings py  You have to add either the app name or the dotted path to the subclass of AppConfig in apps py in the app folder  depending on the version of django you are using     Refer documentation   INSTALLED APPS  You don t have migrations folder inside those apps   Solution  just create that folder   You don t have   init   py file inside migrations folder of those apps   Solution  Just create an empty file with name   init   py  You don t have an   init   py file inside the app folder   Solution  Just create an empty file with name   init   py  You don t have a models py file in the app Your Python class  supposed to be a model  in models py doesn t inherit django db models Model You have some semantic mistake in definition of models in models py   Note  A common mistake is to add migrations folder in  gitignore file  When cloned from remote repo  migrations folder and or   init   py files will be missing in local repo  This causes problem   I suggest to gitignore migration files by adding the following lines to  gitignore file    migrations      migrations   init   py

User · Answer

People like me who don t like migrations can use steps below    Remove changes what you want to sync  Run python manage py makemigrations app label for the initial migration  Run python manage py migrate for creating tables before you make changes  Paste changes which you remove at first step  Run 2  and 3  steps    If you confused any of these steps  read the migration files  Change them to correct your schema or remove unwanted files but don t forget to change next migration file s dependencies part     I hope this will help someone in future

User · Answer

Adding my 2c  since none of these solutions worked for me  but this did     I had just run manage py squashmigrations and removed the old migrations  both the files and lines in the the django migrations database table    This left a line like this in the last migration file   replaces     b my app    0006 auto 20170713 1735     b my app    0007 auto 20170713 2003     b my app    0008 auto 20170713 2004      This apparently confused Django and caused weird behavior  running manage py makemigrations my app would recreate the initial migration as if none existed  Removing the replaces    line fixed the problem

User · Answer

Agree with  furins  If everything seems to be in order and yet this problem arises  checkout if there is any property method with same title as the attribute which you are trying to add in the Model class     Remove method with similar name as attribute you are adding  manage py makemigrations my app manage py migrate my app Add the methods back

User · Answer

You want to check the settings py in the INSTALLED APPS list and make sure all the apps with models are listed in there   Running makemigrations in the project folder means it will look to update all the tables related to all the apps included in settings py for the project  Once you include it  makemigrations will automatically include the app  this saves a lot of work so you don t have to run makemigrations app name for every app in your project site

User · Answer

Adding this answer because only this method helped me   I deleted the migrations folder run makemigrations and migrate  It still said  No migrations to apply   I went to migrate folder and opened the last created file  comment the migration I wanted It was detected and entered there  and run migrate again   This basically editing the migrations file manually  Do this only if you understand the file content

User · Answer

This is kind of a stupid mistake to make  but having an extra comma at the end of the field declaration line in the model class  makes the line have no effect   It happens when you copy paste the def  from the migration  which itself  is defined as an array   Though maybe this would help someone  -

User · Answer

Added this answer because none of other available above worked for me   In my case something even more weird was happening  Django 1 7 Version   In my models py I had an  extra  line at the end of my file  it was a blank line  and when I executed the python manage py makemigrations command the result was   no changes detected    To fix this I deleted this  blank line  that was at the end of my models py file and I did run the command again  everything was fixed and all the changes made to models py were detected

User · Answer

I recently upgraded Django from 1 6 to 1 8 and had few apps and migrations for them  I used south and schemamigrations for creating migrations in Django 1 6  which is dropped in Django 1 8    When I added new models after upgrade  the makemigrations command wasn t detecting any changes  And then I tried the solution suggested by  drojf  1st answer   it worked fine  but failed to apply fake initial migration  python manage py --fake-initial   I was doing this as my tables  old tables  were already created   Finally this worked for me  removed new models  or model changes  from models py and then had to delete  or rename for safety backup  migrations folder of all apps and run python manage py makemigrations  for all apps  then did python manage py migrate --fake-initial  This worked like a charm  Once initial migration is created for all apps and fake initial migrated  then added new models and followed regular process of makemigrations and migrate on that app  The changes were detected now and everything went fine   I just thought of sharing it here  if someone faces same problem  having schemamigrations of south for their apps   it might help them

User · Answer

Had the same problem Make sure whatever classes you have defined in models py  you must have to inherit models Model class   class Product models Model       title   models TextField       description   models TextField       price   models TextField

User · Answer

Following worked for me    Add the app name to settings py use  python manage py makemigrations  use  python manage py migrate    Worked for me  Python 3 4  Django 1 10

User · Answer

The answer is on this stackoverflow post  by cdvv7788 Migrations in Django 1 7     If it is the first time you are migrating that app you have to use       manage py makemigrations myappname Once you do that you can do       manage py migrate If you had your app in database  modified its model   and its not updating the changes on makemigrations you probably havent   migrated it yet  Change your model back to its original form  run the   first command  with the app name  and migrate   it will fake it  Once   you do that put back the changes on your model  run makemigrations and   migrate again and it should work    I was having the exact same trouble and doing the above worked perfectly   I had moved my django app to cloud9 and for some reason I never caught the initial migration

User · Answer

python manage py makemigrations accounts Migrations for  accounts     accounts migrations 0001 initial py     - Create model Customer     - Create model Tag     - Create model Product     - Create model Order  Note  here  accounts  is my app name

User · Answer

Remove changes what you want to sync  Run python manage py makemigrations app label for the initial migration  Run python manage py migrate for creating tables before you make changes  Paste changes which you remove at first step  Run 2  and 3  steps

User · Answer

Maybe this will help someone  I was using a nested app  project appname and I actually had project and project appname in INSTALLED APPS  Removing project from INSTALLED APPS allowed the changes to be detected

User · Answer

Maybe I am too late but did you try to have a migrations folder in your app with a   init   py file in it

User · Answer

In my case I needed to add my model to the  init  py file of the models folder where my model was defined  from myapp models mymodel import MyModel

User · Answer

Maybe this will help someone   I ve deleted my models py and expected makemigrations to create DeleteModel statements   Remember to delete   pyc files

User · Answer

If you re changing over from an existing app you made in django 1 6  then you need to do one pre-step  as I found out  listed in the documentation      python manage py makemigrations your app label   The documentation does not make it obvious that you need to add the app label to the command  as the first thing it tells you to do is python manage py makemigrations which will fail  The initial migration is done when you create your app in version 1 7  but if you came from 1 6 it wouldn t have been carried out  See the  Adding migration to apps  in the documentation for more details

User · Answer

My solution was not covered here so I m posting it   I had been using syncdb for a project   just to get it up and running   Then when I tried to start using Django migrations  it faked them at first then would say it was  OK  but nothing was happening to the database   My solution was to just delete all the migration files for my app  as well as the database records for the app migrations in the django migrations table   Then I just did an initial migration with     manage py makemigrations my app  followed by     manage py migrate my app  Now I can make migrations without a problem

User · Answer

I have encountered this issue  the command python manage py makemigrations  worked with me once I saved the changes that I made on the files

User · Answer

Maybe that can help someone  I had the same problem   I ve already created two tables with the serializer class and the views  So when I wanted to updated  I had this error   I followed this steps    I made   manage py makemigrations app I executed   manage py migrate I erased both tables of my models py I erased all reference to my tables from serializer and view class  I executed step 1 and 2  I retrieved my changes just in the models py I executed again step 5  I restored all my changes    If you re working with Pycharm  local history is very helpfull

User · Answer

You may need to fake the initial migrations using the command below  python manage py migrate --fake-initial

User · Answer

I had the same problem with having to run makemigrations twice and all sorts of strange behaviour   It turned out the root of the problem was that I was using a function to set default dates in my models so migrations was detecting a change every time I ran makemigrations   The answer to this question put me on the right track  Avoid makemigrations to re-create date field

User · Answer

Did u use schemamigration my app --initial after renaming old migration folder  Try it  Might work  If not - try to recreate the database and make syncdb migrate  It worked for me

User · Answer

manage makemigrations   manage migrate   Migrations track changes to DB so if youre changing from unmanaged to managed  you ll need to make sure that youre database table is up to date relating to the Model you re dealing with   If you are still in dev mode  I personally decided to delete the migration files in my IDE as well as in the django migrations table relating to my Model and rerun the above command   REMEMBER  if you have a migration that ends with  001 in your IDE  amp   003 in your database  Django will only see if you have a migration ending with  004 for anything to update   The 2  code  amp  db migrations  are linked and work in tandem   Happy coding

User · Answer

First this solution is applicable to those who are facing the same issue during deployment on heroku server  I was facing same issue   To deploy  there is a mandatory step which is to add django heroku settings locals    in settings py file   Changes  When I changed the above line to django heroku settings locals    databases False   it worked flawlessly

User · Answer

Make sure your model is not abstract  I actually made that mistake and it took a while  so I thought I d post it

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