I wrote a Mysql function for my rails app and i added it to my database by manual.
When i want to test the function using Rails UNIT test, it through the errors like below
ActiveRecord::StatementInvalid: Mysql::Error: FUNCTION mydatabase.fn_Sample_Function does not exist:
How to add the function, out of the test suite or beginning of test run ?
Thanks in Advance,
Aaa.
I can't see the error. But I assume the problem is your schema format.
config.active_record.schema_format = :sql
in application.rb should be what you need to do.
The reason behind that is by default your test database is not made from a schema only dump of your development database, but, instead from db/schema.rb - which knows nothing about mysql functions.
an sql schema format will do a mysqldump (or pg_dump) with the schema only flag set to true and create a development_structure.sql file.
Related
I have some custom functions and triggers, that were run as migrations and added into dev db. However when i run my tests - it seems like test db doesn't have these functions and triggers, and throws errors in specs, which using queries that requires these db-functions. I've tried to manually run
rake db:test:clone - but that copies only db structure, not its functions and triggers. How do i create full duplicate for db, keeping not only its structure, but also custom db functions, triggers and views?
PS: Db: postgres
I recommend you use this setting:
config.active_record.schema_format = :sql
This would create a real sql file containing all details of your db.
And it would be loaded whenever you use rake db:setup
Before changing the setting, you could use rake db:structure:dump to create the sql file.
Using Rails 3.2.18 and Postgres, I have a few tables for which I have created a view to minimize the data loaded by ActiveRecord. Everything appears to be running correctly when in the application, but when I try to run Rspec I get:
ActiveRecord::StatementInvalid:
PG::UndefinedTable: ERROR: relation "properties_view" does not exist
(where 'properties_view' is the view on the 'properties' table)
What can I do to ensure that Rspec loads views properly from Postgres?
Rails doesn't really understand "advanced" database concepts like views so they won't appear in your schema.rb. When rspec is setting up its test database, it will use schema.rb to create the database schema, since you won't find your views in schema.rb, you won't find your views in the test database that rspec will be using and everything falls apart.
The solution is to switch from schema.rb to structure.sql. You should be able to update your config/application.rb to say:
config.active_record.schema_format = :sql
and then do a rake db:structure:dump to generate the structure.sql file. Once you have that, remove schema.rb from your file system and revision control, add structure.sql, and try again.
If you don't want to switch to the SQL schema format, using the scenic gem may help (Scenic Gem Gitub).
They allow you to add SQL Views (also materialized) to migrations and also adds them to your ruby schema.
Worked for me like a charm.
I have some raw sql statements that create triggers and functions in my migrations. They are not invoked in the tests.
How can I use normal migrations to setup the test database? And why isn't that the default method?
Reason is that the test database is restored from schema.rb file. And Schema dump doesnt create procedures,functions, fkeys etc. The reason for that is Rails doesnt encourage using them. You can however change the schema dump format to sql.
config.active_record.schema_format = :sql
See following thread Why does rake db:migrate in Rails not add functions to the schema file?
Check this article as well http://pivotallabs.com/users/jdean/blog/articles/1707-using-mysql-foreign-keys-procedures-and-triggers-with-rails
Is there an easy way to see the actual SQL generated by a rails migration?
I have a situation where a migration to change a column type worked on my local development machine by partially failed on the production server.
My postgreSQL versions are different between local and production (7 on production, 8 on local) so I'm hoping by looking at the SQL generated on the successful migration locally I can work out a SQL statement to run on production to fix things....
Look at the log files: log/development.log locally vs log/production.log on your server.
I did some digging and found another way this can be achieved too... (This way only gives you the SQL so it was a bit easier for me to read)
Postgresql will log all the queries executed if you put this line in your config file: (there's an example which has been commented out in the "What to log" section of the config file)
log_statement = 'all'
Then I rolled back and re-ran my migration locally to find the SQL I was looking for.
This method also gives you the SQL in a format where you can easily paste it into something like PGAdmin's query builder and mess around with it.
You could set the logger to STDOUT at the top of your migration's change, up, or down methods. Example:
class SomMigration < ActiveRecord::Migration
def change
ActiveRecord::Base.logger = Logger.new(STDOUT)
# ...
end
end
Or see this answer for adding SQL logging to all rake tasks
I have a migration that runs an SQL script to create a new Postgres schema. When creating a new database in Postgres by default it creates a schema called 'public', which is the main schema we use. The migration to create the new database schema seems to be working fine, however the problem occurs after the migration has run, when rails tries to update the 'schema_info' table that it relies on it says that it does not exist, as if it is looking for it in the new database schema and not the default 'public' schema where the table actually is.
Does anybody know how I can tell rails to look at the 'public' schema for this table?
Example of SQL being executed: ~
CREATE SCHEMA new_schema;
COMMENT ON SCHEMA new_schema IS 'this is the new Postgres database schema to sit along side the "public" schema';
-- various tables, triggers and functions created in new_schema
Error being thrown: ~
RuntimeError: ERROR C42P01 Mrelation "schema_info" does not exist
L221 RRangeVarGetRelid: UPDATE schema_info SET version = ??
Thanks for your help
Chris Knight
Well that depends what your migration looks like, what your database.yml looks like and what exactly you are trying to attempt. Anyway more information is needed change the names if you have to and post an example database.yml and the migration. does the migration change the search_path for the adapter for example ?
But know that in general rails and postgresql schemas don't work well together (yet?).
There are a few places which have problems. Try and build and app that uses only one pg database with 2 non-default schemas one for dev and one for test and tell me about it. (from thefollowing I can already tell you that you will get burned)
Maybe it was fixed since the last time I played with it but when I see http://rails.lighthouseapp.com/projects/8994/tickets/390-postgres-adapter-quotes-table-name-breaks-when-non-default-schema-is-used or this http://rails.lighthouseapp.com/projects/8994/tickets/918-postgresql-tables-not-generating-correct-schema-list or this in postgresql_adapter.rb
# Drops a PostgreSQL database
#
# Example:
# drop_database 'matt_development'
def drop_database(name) #:nodoc:
execute "DROP DATABASE IF EXISTS #{name}"
end
(yes this is wrong if you use the same database with different schemas for both dev and test, this would drop both databases each time you run the unit tests !)
I actually started writing patches. the first one was for the indexes methods in the adapter which didn't care about the search_path ending up with duplicated indexes in some conditions, then I started getting hurt by the rest and ended up abandonning the idea of using schemas: I wanted to get my app done and I didn't have the extra time needed to fix the problems I had using schemas.
I'm not sure I understand what you're asking exactly, but, rake will be expecting to update the version of the Rails schema into the schema_info table. Check your database.yml config file, this is where rake will be looking to find the table to update.
Is it a possibility that you are migrating to a new Postgres schema and rake is still pointing to the old one? I'm not sure then that a standard Rails migration is what you need. It might be best to create your own rake task instead.
Edit: If you're referencing two different databases or Postgres schemas, Rails doesn't support this in standard migrations. Rails assumes one database, so migrations from one database to another is usually not possible. When you run "rake db:migrate" it actually looks at the RAILS_ENV environment variable to find the correct entry in database.yml. If rake starts the migration looking at the "development" environment and database config from database.yml, it will expect to update to this environment at the end of the migration.
So, you'll probably need to do this from outside the Rails stack as you can't reference two databases at the same time within Rails. There are attempts at plugins to allow this, but they're majorly hacky and don't work properly.
You can use pg_power. It provides additional DSL for migration to create PostgreSQL schemas and not only.