Class: Brant::MigrationFile

Inherits:
Object
  • Object
show all
Defined in:
lib/brant/migration_file.rb

Overview

Representation of the actual file that stores a migration

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename) ⇒ MigrationFile

Constructor logic



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# File 'lib/brant/migration_file.rb', line 60

def initialize(filename)
  self.filename   = filename

  parts           = self.filename.split('_')
  self.timestamp  = parts.last.split('.').first
  self.klass      = parts[0..-2].join('_').camelize
end

Instance Attribute Details

#filename ⇒ Object

Returns the value of attribute filename.



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# File 'lib/brant/migration_file.rb', line 7

def filename
  @filename
end

#klass ⇒ Object

Returns the value of attribute klass.



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# File 'lib/brant/migration_file.rb', line 7

def klass
  @klass
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/brant/migration_file.rb', line 7

def timestamp
  @timestamp
end

Class Method Details

.all ⇒ Object

Returns hash of migration file objects of all defnied migrations with their timestamps as the keys



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# File 'lib/brant/migration_file.rb', line 12

def self.all
  migrations = {}

  if File.exists? Brant.migrationsPath
    Dir.entries(Brant.migrationsPath).each do |file|
      next if file.length < 3 || file.match(/^\./)
      migration = new(file)
      migrations[migration.timestamp] = migration
    end
  end

  migrations
end

.existing ⇒ Object

Returns a hash of migration timestamps that have been performed



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# File 'lib/brant/migration_file.rb', line 29

def self.existing
  migrations = {}
  
  if File.exists? Brant.migrationsConfigPath
    File.open(Brant.migrationsConfigPath,'r') do |file|
      while(line = file.gets)
        migrations[line.chomp] = true
      end
    end
  end

  migrations
end

.update(migrations) ⇒ Object

Update migrations config to show all finished migrations



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# File 'lib/brant/migration_file.rb', line 45

def self.update(migrations)
  File.open(Brant.migrationsConfigPath,'w') do |file|
    file.write migrations.join("\n")
  end
end

Instance Method Details

#<=>(other) ⇒ Object

Compare objects based on timestamp



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# File 'lib/brant/migration_file.rb', line 54

def <=>(other)
  self.timestamp <=> other.timestamp
end