SCENARIO:
I have a ruby (2.2.3) on rails (4.2.4) application, working on a Firebird(2.5) database through activerecord-fb-adapter(1.0.2). This is a legacy database with ISO-8859-1 encoding, so I set up my database.yml file with encoding ISO-8859-1. Rails default encode is UTF-8, so I set up my application.rb file like this:
#config\application.rb
config.encoding = "ISO-8859-1"
Database.yml file:
#config\database.yml
default: &default
adapter: fb
encoding: ISO-8859-1
create: false
charset: ISO8859_1
development:
<<: *default
database: db/cadastro.fdb
username: sysdba
password: masterkey
host: localhost
ERROR:
The data coming from the database are ok, but when I tried to save data into the database or tried to show hard coded strings in a browser I receive a character error:
browser error:
code:
<th class="text-center">Data de Serviço</th>
output:
Data de Serviço
database error:
seeds:
MotoboyServiceType.where(:service_type => "REDAÇÃO").first_or_create
database:
REDAÇÃO
QUESTION:
How can I setup my application, so I can save the right data on database and display strings with right special characters?
Related
The postgresql table looks like:
id | name | size | md5sum
----+-----------------------------------------+------+----------------------------------
1 | MyPreferredGenomeName | 1000 | df768fde8e10e15511c41895363bcce6
I am trying to retrieve the data:
myData = myClass.find_by name: "MyPreferredGenomeName" # also tried with other columns
# or
myData = myClass.where name: "MyPreferredGenomeName"
and I get the error stated in the title from activerecord-5.2.4.3/lib/active_record/connection_adapters/abstract/connection_pool.rb:1032:in retrieve_connection'`.
I don't have the most basic understanding of what's going on... Help.
Also, what does 'primary' stand for?
Thank you!
I suspect your config/database.yml is not configured correctly.
In that file you should have something similar to:
...
default: &default
adapter: postgresql
encoding: unicode
pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
development:
<<: *default
database: database_name_development
...
You want to make sure that database_name_development is the name of the database in your local PostgreSQL instance. Is your database actually called primary as that is what the error seems to be saying.
You show the psql output with the table named MyPreferredGenomeName so whatever database that is in is needed in database.yml.
You can test what database Rails is looking for with:
rails console
ActiveRecord::Base.connection.current_database
=> "database_name_development"
(Do not post any secrets in any replies e.g. db passwords or full connection strings.)
I'm having some trouble loading custom configuration data from a yml file. I've looked at a few resources and can't seem to get anywhere with it.
When I try to load some custom settings from the yml file I get an empty hash.
my application.rb contains:
config.myapp = config_for(:myapp)
my myapp.yml contains:
default: &default
emails:
support: test#myapp.com
marketing: marketing#myapp.com
address: 123 Test lane
production:
<<: *default
development:
<<: *default
test:
<<: *default
When I call:
Rails.configuration.myapp
I get:
{}
Any thoughts what the issue might be?
Thanks
It's got something to do with the lifecycle of the Application object and where your config.myapp = config_for(:myapp) call sits.
So I tried it locally and solved this problem by putting it inside a config.before_initialize callback block:
this is in my config/application.rb file
config.before_initialize do
config.myapp = config_for(:myapp)
end
and then in rails console Rails.application.config.myapp correctly dumps the config parsed from yml.
I am developing a Ruby on Rails app using postgre gem and this is how my database.yml looks like:
development:
adapter: postgresql
encoding: utf-8
pool: 5
username: "hytxlzju"
password: "xxxxx"
host: "jumbo.db.elephantsql.com"
port: "5432"
database: "hytxlzju"
production:
adapter: postgresql
encoding: utf-8
pool: 5
username: "hytxlzju"
password: "xxxxxx"
host: "jumbo.db.elephantsql.com"
port: "5432"
database: "hytxlzju"
Whenever I am connecting to this db locally, from the rails console I am getting too many connections. How can I kill a connection in the code, once the user logged out, in the code, and how can I kill one in my rails console, after I finished altering the tables?
[EDIT]
This is the error message:
C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/activerecord-3.2.22.5/lib/active_record/connection_adapters/postgresql_adapter.rb:12
22:in `initialize': FATAL: too many connections for role "hytxlzju" (PG::ConnectionBad)
[EDIT] I added my initilizer, still no success:
Rails.application.config.after_initialize do
ActiveRecord::Base.connection_pool.disconnect!
ActiveSupport.on_load(:active_record) do
config = ActiveRecord::Base.configurations[Rails.env] ||
Rails.application.config.database_configuration[Rails.env]
config['pool'] = ENV['DB_POOL'] || ENV['RAILS_MAX_THREADS'] || 5
ActiveRecord::Base.establish_connection(config)
end
end
You can try the below approach
Active Record limits the total number of connections per application
through a database setting pool; this is the maximum size of the
connections your app can have to the database
in config/datbase.yml
pool: <%= ENV['RAILS_MAX_THREADS'] || 5 %>
If you are using puma then use ENV['RAILS_MAX_THREADS'] more here
It might solve the problem.
[SOLVED]
Somehow my demo app was not finding the entries in the tables, so it was creating multiple pools connections, without closing them, because before closing the connection, a 500 error was getting thrown, hence that bit of code where I closed the pool was never closed. More abut postgre session here
https://devcenter.heroku.com/articles/concurrency-and-database-connections#connection-pool
I've just discovered that the reconnect: true configuration option is possible in the database.yml file.
What other possible configuration options are there? Is there a complete reference for all options?
Known key examples:
default: &default
adapter: mysql2
encoding: utf8
pool: 5
username: foo
password: bar
reconnect: true
socket: /var/sock/thing.sock
development:
<<: *default
database: app_development
I don't think there is any place that just lists them but I checked the ActiveRecord's ConnectionAdapaters. Keep in mind that options change which database you use, but this was listed within the MySQL connection adapter.
List of Options for MySQL
:host - Defaults to "localhost".
:port - Defaults to 3306.
:socket - Defaults to "/tmp/mysql.sock".
:username - Defaults to "root"
:password - Defaults to nothing.
:database - The name of the database. No default, must be provided.
:encoding - (Optional) Sets the client encoding by executing "SET NAMES <encoding>" after connection.
:reconnect - Defaults to false (See MySQL documentation: http://dev.mysql.com/doc/refman/5.7/en/auto-reconnect.html).
:strict - Defaults to true. Enable STRICT_ALL_TABLES. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.7/en/sql-mode.html)
:variables - (Optional) A hash session variables to send as SET ##SESSION.key = value on each database connection. Use the value +:default+ to set a variable to its DEFAULT value. (See MySQL documentation: http://dev.mysql.com/doc/refman/5.7/en/set-statement.html).
:sslca - Necessary to use MySQL with an SSL connection.
:sslkey - Necessary to use MySQL with an SSL connection.
:sslcert - Necessary to use MySQL with an SSL connection.
:sslcapath - Necessary to use MySQL with an SSL connection.
:sslcipher - Necessary to use MySQL with an SSL connection.
The github for Rails ActiveRecord adapters, https://github.com/rails/rails/tree/master/activerecord/lib/active_record/connection_adapters
edit:
Adding what #pjrebsch commented below. You can also see MySQL options on the Mysql2 gem's Readme
I am trying to set up ruby on rails to develop locally on a 64 bit windows 7 machine using SQL server 2005. We have an existing database and it does not conform to the ruby way so I created a table to test conectivity.
Unable to find information on properly configuring the database.yml file I suspect my problem is there. I have both 32-bit and 64-bit DSNs defined. When I run the console I get "Table doesn't exist"
Here's my database.yml. I don't know
default: &default
host: 111.222.333.444
adapter: sqlserver
mode: odbc
dsn: DSN_Name
database: ERP
username: sa
password: ********
development:
<<: *default
host: 111.222.333.444
adapter: sqlserver
mode: odbc
dsn: DSN_Name
database: ERP
username: sa
password: ********
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
<<: *default
database: db/test.sqlite3
production:
<<: *default
database: db/production.sqlite3
Does anyone know how the default works? I can't find any information on it. Specifically "<<: *default"
I updated my database.yml file. Created a table for testing; used the plural and ID for the primary key:
CREATE TABLE [dbo].[Cars](
[ID] [int] NULL,
[Name] [nchar](10) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
) ON [PRIMARY]
Created a model
class Car < ActiveRecord::Base
end
But I get "Table doesn't exist" after connecting to Car and entering 'Car'. Anyone have any idea what the next step would be to debug this?
The &default in the line default: &default, means make the key/value pairs under this YAML namespace available as the variable *default.
The <<: *default lines are taking those key/value pairs, and making them part of the other groups, so you only need to change values that are different from the default: group.
If all your databases are on the same machine, then your database.yml should look a lot like this:
default: &default
host: 111.222.333.444
adapter: sqlserver
mode: odbc
dsn: DSN_Name
username: sa
password: ********
development:
<<: *default
database: ERP_development
test:
<<: *default
database: ERP_test
production:
<<: *default
database: ERP_production
Since you are on sqlserver, you'll probably have to create all those databases yourself (instead of letting Rails do it for you).
from: https://github.com/rails-sqlserver/activerecord-sqlserver-adapter
Force Schema To Lowercase
Although it is not necessary, the Ruby convention is to use lowercase
method names. If your database schema is in upper or mixed case, we
can force all table and column names during the schema reflection
process to be lowercase. Add this to your config/initializers file for
the adapter.
ActiveRecord::ConnectionAdapters::SQLServerAdapter.lowercase_schema_reflection = true
Schemas & Users
Depending on your user and schema setup, it may be needed to use a
table name prefix of dbo.. So something like this in your initializer
file for ActiveRecord or the adapter.
ActiveRecord::Base.table_name_prefix = 'dbo.'