ponyorm migration tool

[steinster]

Hello,

I'm not sure if this is the place to put this question. If there is a better place please let me know.

Is there a DB migration tool for pony orm? Something like alembic for sqlalchemy..

[amalashkevich]

Hi,
There is no such a tool yet, although we are working on it. Will let you know when it is ready. Thank you for asking.

On Aug 7, 2013, at 11:51 AM, steinster notifications@github.com wrote:

Hello,

I'm not sure if this is the place to put this question. If there is a better place please let me know.

Is there a DB migration tool for pony orm? Something like alembic for sqlalchemy..

—
Reply to this email directly or view it on GitHub.

[steinster]

If you need any help with it I would love to help with the project a bit.

[amalashkevich]

Thank you, I appreciate it, we'll get in touch.

On Aug 7, 2013, at 7:27 PM, steinster notifications@github.com wrote:

If you need any help with it I would love to help with the project a bit.

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Reply to this email directly or view it on GitHub.

[amalashkevich]

Hi,
We have created the mailing list ponyorm-list@ponyorm.com. This is the place to ask questions, share experiences, or discuss the Pony ORM with other users and the Pony ORM developers. You can subscribe to the list at http://ponyorm-list.ponyorm.com
Regards,
Alexey

[guyskk]

+1

[NiklasRosenstein]

+1

[andreymal]

Even third-party tools are still not exist?

[nadermx]

Any specific parts I can try and help with getting this done? I need migrations pretty badly at this point

[kozlovsky]

Right now we are working on release with full JSON support, and after that we will switch to working on migrations. Hope the initial version will be released soon after that..

[Vic020]

+1
get in touch

[hackrole]

+1, waiting for your staff

[misakar]

+1

[nadermx]

@kozlovsky I saw that you pushed the json update! Any word or any suggestions on how I could contribute with some code in the method you have in mind in order to get migrations done quicker. Having to do manual alter tables and indexing is getting to be cumbersome

[darkf]

Yeah, this is the main missing feature of Pony right now. It's excellent otherwise, but really needs migrations (preferably automatic).

[pingf]

really needed!

[sighalt]

+1

[TimothyBramlett]

+1

[pylover]

+1

[danielhrisca]

Any progress with this topic?

[dimi-tree]

+1

[darkf]

@amalashkevich @kozlovsky Any status update on this? There are approximately a kajillion people waiting on and +1ing this, it would be nice to see where it's going or if we should migrate (pun intended) to another ORM with this functionality.

[kozlovsky]

The core migration functionality is done, we need approximately two weeks to release the first version

[darkf]

Thanks for the update! Good to hear.

[danielhrisca]

Great news! Thank you for your work!

[famargar]

Keep us posted!

[kafeg]

Hi! Very important feature! Waiting for release)

[kickapoo]

In my case this is the only thing that block me for full pass to pony.
Please @kozlovsky if you could give another feedback about the current state will be most appriciated.

[kozlovsky]

At this moment we have some internal branch which can handle simple migrations (like, adding/deleting entities, attributes and relationships). I hope we can push it to GitHub really soon. But before that we need to do some final review during this week.

[johanngomes]

Hi, @kozlovsky and team. Any news on when we can have this migration functionality? Thanks,

[kozlovsky]

Hi, I just pushed a new branch orm-migrations with the first version of PonyORM migrations. You can read the description of API here: https://github.com/ponyorm/pony/tree/orm-migrations/pony/migrate

The code is very raw at this point and not intended for production usage yet, we still need to work on it. I think really simple use-cases for PostgreSQL and MySQL should work, but SQLite support is limited, and merge functionality is untested. Adding entity or attribute should work, but, say, changing inheritance hierarchy or modifying a type of relationship will raise NotImplementedError. Anyway, I hope the working version of migrations is close.

[johanngomes]

Thank you for your update, @kozlovsky !

[hammeronthenet]

Hi @kozlovsky,
nice!

One question: what's better to install 0.8 version? When do you think 0.8 will be available on pip?

Thank you!

[zxytim]

How's migration going now?

[patrickporto]

In moment has some alternative for schema migrations on PonyORM?

[nadermx]

I can confirm that migrations is working, if you want to install it via pip currently do the following

pip install git+git://github.com/ponyorm/pony.git@orm-migrations

All the documentation on how to do migration can be found here

Also if you are using pony with flask blueprints, please note ref another issue

generate_mapping call from app/init.py to some submodule like app/main.py which is not imported when from app import models line of migrate.py module is executed

[japrogramer]

what is the status of this orm-migrations? when will it be merged upstream.

[dibstern]

+1
Pony seems awesome, but I can’t use an ORM without a reliable migrations tool. Super keen for this to be released and to start using Pony

[Elijas]

The way I currently solve the migration problem is by partly using a SQL migration script generator (Liquibase at the moment).

I create two schemas with ponyorm, then run them apply them on two different databases, then run the SQL diff tool to generate SQL code (ALTER, etc.)

Any additional migration of data itself is done within the python, around the SQL code

[Elijas]

By the way - is a subset of migration scripts already ready for production code? Even that would be great

[japrogramer]

@Elijas sounds intense. lots of steps to introduce an error.
Would prefer a similar migration layout to the django orm.

[Elijas]

@Elijas sounds intense. lots of steps to introduce an error.
Would prefer a similar migration layout to the django orm.

I think so too, but I kinda really want to keep ponyorm :D

To make it less error-prone, I'm currently considering using

• https://ollycope.com/software/yoyo/latest/ for schema-migrations
• pony orm as intermediate steps for data-migrations (with one pony orm schema for each either schema version or intermediary step)

Are there any other good alternatives to yoyo? For the schema-migrations, as I'd rather migrate data with pony

[Elijas]

I've searched some info about migrations, and why it's a difficult task - I think this article summarizes it best, though you guys might want to look at it, to acquire some sympathy for the @ steinster

[zxytim]

How's migration going now? It's been more than a year since my last check.
Is there any roadmap that migration will be merged into orm branch, or the release of 0.8.0?
Really looking forward to the official release of migration function.
@kozlovsky Is there anything we could do help accelerate this process? How can we help you?

[Elijas]

They are working on migrations intensively now again, and expect to release it during summer. You can help the migrations feature (or the team in general) by donating money (one time or monthly)

[sostholmwork]

Any updates on this? :)

[fluffy-critter]

Even without a full migration tool, is there a mechanism that can be used to do simple column and foreign key additions to a schema in a fairly DB-independent manner? Like the problem seems to become much simpler if you don’t have to worry about renaming or changing data types or the like.

[hadim]

I am also waiting for this to be released. The is a critical feature we need to start using pony.

Does anyone here has experience using nomade or yoyo?

[hadim]

xref with #563

[jbvsmo]

Yay, anybody else here also stuck with Pony ORM because some previous developer picked it without realizing there is no migration support?

This issue is almost 8 years old. Should we still have hope or move on?

[Elijas]

@jbvsmo I'd recommend reaching out in their telegram chats - that's a direct line of communication with the developers, you probably will get your to your answer the fastest this way.

Although in my personal opinion, I wouldn't advise to keep your hope too up high.

[daveflr]

Just move one guys

[wwarreniv]

any update on migrations for pony? We'd love to help out.

[kentaasvang]

updates?