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** Find commmonly accessed tables and their use of indexes: | |
SELECT relname,seq_tup_read,idx_tup_fetch,cast(idx_tup_fetch AS numeric) / (idx_tup_fetch + seq_tup_read) AS idx_tup_pct FROM pg_stat_user_tables WHERE (idx_tup_fetch + seq_tup_read)>0 ORDER BY idx_tup_pct; | |
Returns output like: | |
relname | seq_tup_read | idx_tup_fetch | idx_tup_pct | |
----------------------+--------------+---------------+------------------------ | |
schema_migrations | 817 | 0 | 0.00000000000000000000 | |
user_device_photos | 349 | 0 | 0.00000000000000000000 |
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# Usage: | |
# | |
# validates :array_column, array: { length: { is: 20 }, allow_blank: true } | |
# validates :array_column, array: { numericality: true } | |
# | |
# It also supports sliced validation | |
# | |
# validates :array_column, array: { presence: true, slice: 0..2 } | |
class ArrayValidator < ActiveModel::EachValidator |
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namespace :db do | |
require "sequel" | |
Sequel.extension :migration | |
DB = Sequel.connect(ENV['DATABASE_URL']) | |
desc "Prints current schema version" | |
task :version do | |
version = if DB.tables.include?(:schema_info) | |
DB[:schema_info].first[:version] | |
end || 0 |
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# SSL self signed localhost for rails start to finish, no red warnings. | |
# 1) Create your private key (any password will do, we remove it below) | |
$ openssl genrsa -des3 -out server.orig.key 2048 | |
# 2) Remove the password | |
$ openssl rsa -in server.orig.key -out server.key |