Class: Baza::Driver::Sqlite3::Tables

Inherits:
Object
  • Object
show all
Defined in:
lib/baza/drivers/sqlite3/tables.rb

Direct Known Subclasses

Baza::Driver::Sqlite3Java::Tables

Constant Summary collapse

CREATE_ALLOWED_KEYS = 
[:indexes, :columns]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Tables

Returns a new instance of Tables.



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 4

def initialize(args)
  @args = args
  @db = @args[:db]

  @list_mutex = Mutex.new
  @list = Wref::Map.new
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 2

def db
  @db
end

#driver ⇒ Object (readonly)

Returns the value of attribute driver.



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 2

def driver
  @driver
end

Instance Method Details

#[](table_name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/baza/drivers/sqlite3/tables.rb', line 12

def [](table_name)
  table_name = table_name.to_sym

  if ret = @list.get(table_name)
    return ret
  end

  self.list do |table_obj|
    return table_obj if table_obj.name == table_name
  end

  raise Errno::ENOENT, "Table was not found: #{table_name}."
end

#add_to_list(table) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 69

def add_to_list(table)
  raise "Already exists: '#{table.name}'." if @list.key?(table.name) && @list[table.name].__id__ != table.__id__
  @list[table.name] = table
end

#create(name, data, args = nil) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 75

def create(name, data, args = nil)
  data.each do |key, val|
    raise "Invalid key: '#{key}' (#{key.class.name})." unless CREATE_ALLOWED_KEYS.include?(key)
  end

  sql = "CREATE TABLE `#{name}` ("

  first = true
  data[:columns].each do |col_data|
    sql << ", " if !first
    first = false if first
    sql << @db.cols.data_sql(col_data)
  end

  sql << ")"

  if args && args[:return_sql]
    ret = [sql]
  else
    @db.query(sql)
  end

  if data.key?(:indexes) && data[:indexes]
    table_obj = self[name]

    if args && args[:return_sql]
      ret += table_obj.create_indexes(data[:indexes], return_sql: true)
    else
      table_obj.create_indexes(data[:indexes])
    end
  end

  if args && args[:return_sql]
    return ret
  else
    return nil
  end
end

#exists_in_list?(table) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/baza/drivers/sqlite3/tables.rb', line 60

def exists_in_list? table
  @list.key?(table.name)
end

#list ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 26

def list
  ret = {} unless block_given?

  @list_mutex.synchronize do
    q_tables = @db.select("sqlite_master", {"type" => "table"}, {orderby: "name"}) do |d_tables|
      next if d_tables[:name] == "sqlite_sequence"

      tname = d_tables[:name].to_sym
      obj = @list.get(tname)

      unless obj
        obj = Baza::Driver::Sqlite3::Table.new(
          db: @db,
          data: d_tables,
          tables: self
        )
        @list[tname] = obj
      end

      if block_given?
        yield(obj)
      else
        ret[tname] = obj
      end
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#remove_from_list(table) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/tables.rb', line 64

def remove_from_list(table)
  raise "Table doesnt exist: '#{table.name}'." unless @list.key?(table.name)
  @list.delete(table.name)
end