Class: KnjDB_sqlite3::Tables

Inherits:
Object
  • Object
show all
Defined in:
lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb

Defined Under Namespace

Classes: Table

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/knj/knjdb/drivers/sqlite3/knjdb_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/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 2

def db
  @db
end

#driver ⇒ Object (readonly)

Returns the value of attribute driver.



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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 2

def driver
  @driver
end

Instance Method Details

#[](table_name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 12

def [](table_name)
  table_name = table_name.to_s
  
  begin
    ret = @list[table_name]
    return ret
  rescue Wref::Recycled
    #ignore.
  end
  
  self.list do |table_obj|
    return table_obj if table_obj.name.to_s == table_name.to_s
  end
  
  raise Errno::ENOENT, "Table was not found: #{table_name}."
end

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



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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 59

def create(name, data, args = nil)
  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 and args[:return_sql]
    ret = [sql]
  else
    @db.query(sql)
  end
  
  if data.key?("indexes") and data["indexes"]
    table_obj = self[name]
    
    if args and args[:return_sql]
      ret += table_obj.create_indexes(data["indexes"], :return_sql => true)
    else
      table_obj.create_indexes(data["indexes"])
    end
  end
  
  if args and args[:return_sql]
    return ret
  else
    return nil
  end
end

#list ⇒ Object 



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# File 'lib/knj/knjdb/drivers/sqlite3/knjdb_sqlite3_tables.rb', line 29

def list
  ret = {} unless block_given?
  
  @list_mutex.synchronize do
    q_tables = @db.select("sqlite_master", {"type" => "table"}, {"orderby" => "name"}) do |d_tables|
      obj = @list.get!(d_tables[:name])
      
      if !obj
        obj = KnjDB_sqlite3::Tables::Table.new(
          :db => @db,
          :data => d_tables
        )
        @list[d_tables[:name]] = obj
      end
      
      if block_given?
        yield(obj)
      else
        ret[d_tables[:name]] = obj
      end
    end
  end
  
  if block_given?
    return nil
  else
    return ret
  end
end