Class: Baza::Driver::Sqlite3::Table

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

Direct Known Subclasses

Baza::Driver::Sqlite3Java::Table

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Table

Returns a new instance of Table.



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

def initialize(args)
  @db = args[:db]
  @data = args[:data]
  @name = @data[:name].to_sym
  @type = @data[:type].to_sym
  @tables = args[:tables]

  @list = Wref::Map.new
  @indexes_list = Wref::Map.new
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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

def name
  @name
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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

def type
  @type
end

Instance Method Details

#clone(newname, args = nil) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 159

def clone(newname, args = nil)
  raise "Invalid name." if newname.to_s.strip.empty?

  sql = "CREATE TABLE `#{newname}` ("
  first = true
  columns.each do |name, col|
    sql << ", " unless first
    first = false if first
    sql << @db.cols.data_sql(col.data)
  end

  sql << ");"
  @db.query(sql)
  @db.query("INSERT INTO `#{newname}` SELECT * FROM `#{name}`")

  indexes_to_create = []
  new_table = @db.tables[newname.to_sym]
  indexes.each do |name, index|
    index_name = name.to_s

    if @db.opts[:index_append_table_name] && match = index_name.match(/\A(.+?)__(.+)\Z/)
      index_name = match[2]
    end

    create_data = index.data
    create_data[:name] = index_name

    indexes_to_create << create_data
  end

  new_table.create_indexes(indexes_to_create)

  if args && args[:return_table] == false
    return nil
  else
    return new_table
  end
end

#column(name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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

def column(name)
  list = self.columns
  return list[name] if list[name]
  raise Errno::ENOENT, "Column not found: #{name}."
end

#columns ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 81

def columns
  @db.cols
  ret = {}

  @db.q("PRAGMA table_info(`#{@db.esc_table(name)}`)") do |d_cols|
    column_name = d_cols[:name].to_sym
    obj = @list.get(column_name)

    unless obj
      obj = Baza::Driver::Sqlite3::Column.new(
        table_name: name,
        db: @db,
        data: d_cols
      )
      @list[column_name] = obj
    end

    if block_given?
      yield obj
    else
      ret[column_name] = obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#copy(args = {}) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 198

def copy(args = {})
  temp_name = "temptable_#{Time.now.to_f.to_s.hash}"
  cloned_tabled = self.clone(temp_name)
  cols_cur = self.columns
  @db.query("DROP TABLE `#{self.name}`")

  sql = "CREATE TABLE `#{self.name}` ("
  first = true
  cols_cur.each do |name, col|
    next if args[:drops] && args[:drops].to_s.include?(name.to_s)

    sql << ", " if !first
    first = false if first

    if args.key?(:alter_columns) && args[:alter_columns][name.to_sym]
      sql << @db.cols.data_sql(args[:alter_columns][name.to_sym])
    else
      sql << @db.cols.data_sql(col.data)
    end

    if args[:new]
      args[:new].each do |col_data|
        if col_data[:after] && col_data[:after] == name
          sql << ", #{@db.cols.data_sql(col_data)}"
        end
      end
    end
  end

  sql << ");"
  @db.query(sql)

  sql = "INSERT INTO `#{self.name}` SELECT "
  first = true
  cols_cur.each do |name, col|
    next if args[:drops] && args[:drops].to_s.include?(name.to_s)

    sql << ", " if !first
    first = false if first

    sql << "`#{name}`"

    if args[:news]
      args[:news].each do |col_data|
        if col_data[:after] && col_data[:after] == name.to_s
          sql << ", ''"
        end
      end
    end
  end

  sql << " FROM `#{temp_name}`"
  @db.query(sql)
  @db.query("DROP TABLE `#{temp_name}`")
end

#create_column_programmatic(col_data) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 122

def create_column_programmatic(col_data)
  temp_name = "temptable_#{Time.now.to_f.to_s.hash}"
  cloned_tabled = self.clone(temp_name)
  cols_cur = self.columns
  @db.query("DROP TABLE `#{self.name}`")

  sql = "CREATE TABLE `#{self.name}` ("
  first = true
  cols_cur.each do |name, col|
    sql << ", " if !first
    first = false if first
    sql << @db.cols.data_sql(col.data)

    if col_data[:after] and col_data[:after] == name
      sql << ", #{@db.cols.data_sql(col_data)}"
    end
  end
  sql << ");"
  @db.query(sql)

  sql = "INSERT INTO `#{self.name}` SELECT "
  first = true
  cols_cur.each do |name, col|
    sql << ", " if !first
    first = false if first

    sql << "`#{name}`"

    if col_data[:after] and col_data[:after] == name
      sql << ", ''"
    end
  end
  sql << " FROM `#{temp_name}`"
  @db.query(sql)
  @db.query("DROP TABLE `#{temp_name}`")
end

#create_columns(col_arr) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 112

def create_columns(col_arr)
  col_arr.each do |col_data|
    #if col_data.key?("after")
    #  self.create_column_programmatic(col_data)
    #else
      @db.query("ALTER TABLE `#{self.name}` ADD COLUMN #{@db.cols.data_sql(col_data)};")
    #end
  end
end

#create_indexes(index_arr, args = nil) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 318

def create_indexes(index_arr, args = nil)
  if args && args[:return_sql]
    ret = []
  end

  index_arr.each do |index_data|
    if index_data.is_a?(String) or index_data.is_a?(Symbol)
      index_data = {name: index_data, columns: [index_data]}
    end

    raise "No name was given in data: '#{index_data}'." if !index_data.key?(:name) || index_data[:name].to_s.strip.empty?
    raise "No columns was given on index #{index_data[:name]}." if !index_data[:columns] || index_data[:columns].empty?

    name = index_data[:name]
    name = "#{self.name}__#{name}" if @db.opts[:index_append_table_name]

    sql = "CREATE"
    sql << " UNIQUE" if index_data[:unique]
    sql << " INDEX '#{@db.esc_col(name)}' ON `#{@db.esc_table(self.name)}` ("

    first = true
    index_data[:columns].each do |col_name|
      sql << ", " if !first
      first = false if first

      sql << "`#{@db.esc_col(col_name)}`"
    end

    sql << ")"

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

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

#data ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 362

def data
  ret = {
    name: name,
    columns: [],
    indexes: []
  }

  columns.each do |name, column|
    ret[:columns] << column.data
  end

  indexes.each do |name, index|
    ret[:indexes] << index.data if name != "PRIMARY"
  end

  return ret
end

#drop ⇒ Object

Drops the table from the database.



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# File 'lib/baza/drivers/sqlite3/table.rb', line 29

def drop
  raise "Cant drop native table: '#{name}'." if native?
  @db.query("DROP TABLE `#{name}`")
  @tables.remove_from_list(self) if @tables.exists_in_list?(self)
end

#index(index_name) ⇒ Object

Raises:

  • (Errno::ENOENT) 


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# File 'lib/baza/drivers/sqlite3/table.rb', line 254

def index(index_name)
  index_name = index_name.to_sym

  if index = @indexes_list[index_name]
    return index
  end

  if @db.opts[:index_append_table_name]
    tryname = "#{name}__#{index_name}"

    if index = @indexes_list[tryname]
      return index
    end
  end

  indexes do |index|
    if index.name.to_s == "#{name}__#{index_name}"
      return index
    end

    return index if index.name.to_s == index_name.to_s
  end

  raise Errno::ENOENT, "Index not found: #{index_name}."
end

#indexes ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 280

def indexes
  @db.indexes
  ret = {} unless block_given?

  @db.q("PRAGMA index_list(`#{@db.esc_table(name)}`)") do |d_indexes|
    next if d_indexes[:Key_name] == "PRIMARY"
    obj = @indexes_list.get(d_indexes[:name])

    unless obj
      obj = Baza::Driver::Sqlite3::Index.new(
        table_name: name,
        db: @db,
        data: d_indexes
      )

      @indexes_list[d_indexes[:name].to_sym] = obj

      # Get columns from index.
      index_master_data = @db.single(:sqlite_master, type: "index", name: d_indexes[:name])
      parse_columns_from_sql(index_master_data[:sql]).each do |column|
        obj.columns << column
      end
    end

    if block_given?
      yield(obj)
    else
      ret[d_indexes[:name].to_sym] = obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#insert(data) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 380

def insert(data)
  @db.insert(name, data)
end

#inspect ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 388

def inspect
  to_s
end

#maxlength ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 15

def maxlength
  return @data[:maxlength]
end

#native? ⇒ Boolean

Returns true if the table is safe to drop.

Returns:

  • (Boolean) 


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# File 'lib/baza/drivers/sqlite3/table.rb', line 36

def native?
  return true if name.to_s == "sqlite_sequence"
  return false
end

#optimize ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 41

def optimize
  # Not possible in SQLite3.
end

#reload ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 19

def reload
  @data = @db.select("sqlite_master", {type: "table", name: name}, {orderby: "name"}).fetch
end

#rename(newname) ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 45

def rename(newname)
  newname = newname.to_sym

  @tables.remove_from_list(self)
  newtable = clone(newname)
  @db.tables.remove_from_list(newtable)
  drop
  @data[:name] = newname
  @name = newname
  @tables.add_to_list(self)

  #Rename table on all columns and indexes.
  @list.each do |name, column|
    column.args[:table_name] = newname
  end

  @indexes_list.each do |name, index|
    index.args[:table_name] = newname
  end
end

#rows_count ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 23

def rows_count
  data = @db.q("SELECT COUNT(*) AS count FROM `#{name}`").fetch
  return data[:count].to_i
end

#table ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 71

def table
  return @db.tables[@table_name]
end

#to_s ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 384

def to_s
  "#<Baza::Driver::Sqlite3::Table name: \"#{name}\">"
end

#truncate ⇒ Object 



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# File 'lib/baza/drivers/sqlite3/table.rb', line 66

def truncate
  @db.query("DELETE FROM `#{name}` WHERE 1=1")
  return nil
end