Migration and git

Rails
1

Hi there,

I did the following using git in my rails application:

  • creating branch a from master
  • creating a migration
  • using it on development
  • creating a branch b from master
  • making fixes whih include a new migration (the migration number is
    higher
    than on branch a)
  • using it on development
  • merging b to masster
  • using master on production
  • migrate on master works fine

-> everything fine till here

  • merging master to branch a because of this important changes, so a is
    ahead of master not just a fork.
  • now I put a copy of the production database to the development
    database

of course now the migration first created in a is not there, because it
never reached master, but because it has a lower number than the last
migration in master, rake db:migrate does not do anything.
now I tried to give the migration file a newer number, but then rake
db:migrate tells me the table created in the migration would be allready
there. but looking directly inside the database it is not there.

What do I miss and how can I fix this?

note: it could also be because i just changed the db schema from sqlite
to
mysql2.

it seems that rake db:migrate works on the sqlite, not on thy msql
table?

Thanks for help,
Martin

2

On Saturday, December 5, 2015 at 1:11:54 PM UTC, Martin wrote:

  • merging master to branch a because of this important changes, so a is ahead of
    master not just a fork.
  • now I put a copy of the production database to the development database

of course now the migration first created in a is not there, because it never
reached master, but because it has a lower number than the last migration in
master, rake db:migrate does not do anything.

That doesn’t sound right - rake db:migrate runs migrations that have not
been run by comparing the contents of the schema_migrations table with
the list of available migrations: it doesn’t just assume that everything
upto the largest entry has been run (unless possibly you are using the
legacy pre rails 2 migration numbering scheme - no idea if that is still
possible)

The only exception to this is that if you run db:schema:load then it
assumes all migrations upto the version named in schema.rb have run.

Fred

3

Thanks, I found it out. I didn’t take over the database configuration
to the new branch, so it was my mistake. Thats why i deleted this
message.

Martin

Frederick C. writes:

The only exception to this is that if you run db:schema:load then it assumes all
migrations upto the version named in schema.rb have run.

it seems that rake db:migrate works on the sqlite, not on thy msql table?

Thanks for help,
Martin

–
Mag. Martin Kaffanke
http://www.kaffanke.at
+43 650 4514224