Class: ActiveColumn::Migrator
- Inherits:
-
Object
- Object
- ActiveColumn::Migrator
- Defined in:
- lib/active_column/migration.rb
Class Method Summary collapse
- .current_version ⇒ Object
- .down(migrations_path, target_version = nil) ⇒ Object
- .forward(migrations_path, steps = 1) ⇒ Object
- .get_all_versions ⇒ Object
- .migrate(migrations_path, target_version = nil) ⇒ Object
- .migrations_path ⇒ Object
- .rollback(migrations_path, steps = 1) ⇒ Object
- .run(direction, migrations_path, target_version) ⇒ Object
- .schema_migrations_column_family ⇒ Object
- .up(migrations_path, target_version = nil) ⇒ Object
Instance Method Summary collapse
- #current_migration ⇒ Object
- #current_version ⇒ Object
-
#initialize(direction, migrations_path, target_version = nil) ⇒ Migrator
constructor
A new instance of Migrator.
- #migrate ⇒ Object
- #migrated ⇒ Object
- #migrations ⇒ Object
- #pending_migrations ⇒ Object
- #run ⇒ Object
Constructor Details
#initialize(direction, migrations_path, target_version = nil) ⇒ Migrator
Returns a new instance of Migrator.
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# File 'lib/active_column/migration.rb', line 144 def initialize(direction, migrations_path, target_version = nil) cf = ActiveColumn::Tasks::ColumnFamily.new sm_cf = self.class.schema_migrations_column_family unless cf.exists?(sm_cf) cf.create(sm_cf, :comparator_type => 'LongType') end @direction, @migrations_path, @target_version = direction, migrations_path, target_version end |
Class Method Details
.current_version ⇒ Object
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# File 'lib/active_column/migration.rb', line 119 def self.current_version sm_cf = schema_migrations_column_family cf = ActiveColumn::Tasks::ColumnFamily.new if cf.exists?(sm_cf) get_all_versions.max || 0 else 0 end end |
.down(migrations_path, target_version = nil) ⇒ Object
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# File 'lib/active_column/migration.rb', line 98 def self.down(migrations_path, target_version = nil) self.new(:down, migrations_path, target_version).migrate end |
.forward(migrations_path, steps = 1) ⇒ Object
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# File 'lib/active_column/migration.rb', line 90 def self.forward(migrations_path, steps = 1) move(:up, migrations_path, steps) end |
.get_all_versions ⇒ Object
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# File 'lib/active_column/migration.rb', line 114 def self.get_all_versions cas = ActiveColumn.connection cas.get(schema_migrations_column_family, 'all').map {|(name, _value)| name.to_i}.sort end |
.migrate(migrations_path, target_version = nil) ⇒ Object
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# File 'lib/active_column/migration.rb', line 74 def self.migrate(migrations_path, target_version = nil) case when target_version.nil? up(migrations_path, target_version) when current_version == 0 && target_version == 0 when current_version > target_version down(migrations_path, target_version) else up(migrations_path, target_version) end end |
.migrations_path ⇒ Object
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# File 'lib/active_column/migration.rb', line 106 def self.migrations_path 'ks/migrate' end |
.rollback(migrations_path, steps = 1) ⇒ Object
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# File 'lib/active_column/migration.rb', line 86 def self.rollback(migrations_path, steps = 1) move(:down, migrations_path, steps) end |
.run(direction, migrations_path, target_version) ⇒ Object
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# File 'lib/active_column/migration.rb', line 102 def self.run(direction, migrations_path, target_version) self.new(direction, migrations_path, target_version).run end |
.schema_migrations_column_family ⇒ Object
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# File 'lib/active_column/migration.rb', line 110 def self.schema_migrations_column_family :schema_migrations end |
.up(migrations_path, target_version = nil) ⇒ Object
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# File 'lib/active_column/migration.rb', line 94 def self.up(migrations_path, target_version = nil) self.new(:up, migrations_path, target_version).migrate end |
Instance Method Details
#current_migration ⇒ Object
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# File 'lib/active_column/migration.rb', line 159 def current_migration migrations.detect { |m| m.version == current_version } end |
#current_version ⇒ Object
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# File 'lib/active_column/migration.rb', line 155 def current_version migrated.last || 0 end |
#migrate ⇒ Object
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# File 'lib/active_column/migration.rb', line 172 def migrate current = migrations.detect { |m| m.version == current_version } target = migrations.detect { |m| m.version == @target_version } if target.nil? && !@target_version.nil? && @target_version > 0 raise UnknownMigrationVersionError.new(@target_version) end start = up? ? 0 : (migrations.index(current) || 0) finish = migrations.index(target) || migrations.size - 1 runnable = migrations[start..finish] # skip the last migration if we're headed down, but not ALL the way down runnable.pop if down? && !target.nil? runnable.each do |migration| #puts "Migrating to #{migration.name} (#{migration.version})" # On our way up, we skip migrating the ones we've already migrated next if up? && migrated.include?(migration.version.to_i) # On our way down, we skip reverting the ones we've never migrated if down? && !migrated.include?(migration.version.to_i) migration.announce 'never migrated, skipping'; migration.write next end migration.migrate(@direction) (migration) end end |
#migrated ⇒ Object
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# File 'lib/active_column/migration.rb', line 239 def migrated @migrated_versions ||= self.class.get_all_versions end |
#migrations ⇒ Object
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# File 'lib/active_column/migration.rb', line 204 def migrations @migrations ||= begin files = Dir["#{@migrations_path}/[0-9]*_*.rb"] migrations = files.inject([]) do |klasses, file| version, name = file.scan(/([0-9]+)_([_a-z0-9]*).rb/).first raise IllegalMigrationNameError.new(file) unless version version = version.to_i if klasses.detect { |m| m.version == version } raise DuplicateMigrationVersionError.new(version) end if klasses.detect { |m| m.name == name.camelize } raise DuplicateMigrationNameError.new(name.camelize) end migration = MigrationProxy.new migration.name = name.camelize migration.version = version migration.filename = file klasses << migration end migrations = migrations.sort_by { |m| m.version } down? ? migrations.reverse : migrations end end |
#pending_migrations ⇒ Object
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# File 'lib/active_column/migration.rb', line 234 def pending_migrations already_migrated = migrated migrations.reject { |m| already_migrated.include?(m.version.to_i) } end |
#run ⇒ Object
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# File 'lib/active_column/migration.rb', line 163 def run target = migrations.detect { |m| m.version == @target_version } raise UnknownMigrationVersionError.new(@target_version) if target.nil? unless (up? && migrated.include?(target.version.to_i)) || (down? && !migrated.include?(target.version.to_i)) target.migrate(@direction) (target) end end |