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

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

Direct Known Subclasses

Baza::Driver::Sqlite3Java::Tables

Constant Summary collapse

CREATE_ALLOWED_KEYS = 
[:indexes, :columns].freeze

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/driver/sqlite3/tables.rb', line 6

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

  @list_mutex = Monitor.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/driver/sqlite3/tables.rb', line 4

def db
  @db
end

#driver ⇒ Object (readonly)

Returns the value of attribute driver.



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

def driver
  @driver
end

Instance Method Details

#[](table_name) ⇒ Object

Raises:



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# File 'lib/baza/driver/sqlite3/tables.rb', line 14

def [](table_name)
  table_name = table_name.to_s

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

  list(name: table_name) do |table|
    return table if table.name == table_name
  end

  raise Baza::Errors::TableNotFound, "Table was not found: #{table_name}."
end

#add_to_list(table) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/tables.rb', line 73

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/driver/sqlite3/tables.rb', line 79

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

  raise "No columns given" if data.fetch(:columns).empty?

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

  first = true
  data.fetch(:columns).each do |col_data|
    sql << ", " unless first
    first = false if first
    sql << @db.columns.data_sql(col_data)
  end

  sql << ")"

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

  if data[:indexes]
    table_obj = self[name]

    if args && args[:return_sql]
      ret += table_obj.create_indexes(data.fetch(:indexes), return_sql: true)
    else
      table_obj.create_indexes(data.fetch(: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/driver/sqlite3/tables.rb', line 64

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

#list(args = {}) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/tables.rb', line 27

def list(args = {})
  ret = [] unless block_given?

  @list_mutex.synchronize do
    tables_args = {type: "table"}
    tables_args[:name] = args.fetch(:name) if args[:name]

    @db.select("sqlite_master", tables_args, orderby: "name") do |d_tables|
      table_name = d_tables.fetch(:name)
      next if table_name == "sqlite_sequence"

      obj = @list.get(table_name)

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

      if block_given?
        yield obj
      else
        ret << obj
      end
    end
  end

  if block_given?
    nil
  else
    ret
  end
end

#remove_from_list(table) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/tables.rb', line 68

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