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

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

Direct Known Subclasses

Baza::Driver::Sqlite3Java::Table

Instance Attribute Summary collapse

Attributes inherited from Table

#db

Instance Method Summary collapse

Methods inherited from Table

#<=>, #row, #rows, #to_param, #upsert_duplicate_key

Methods included from Baza::DatabaseModelFunctionality

#model_name, #to_model

Constructor Details

#initialize(args) ⇒ Table

Returns a new instance of Table.



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

def initialize(args)
  @db = args.fetch(:db)
  @data = args.fetch(:data)
  @name = @data.fetch(:name)
  @type = @data.fetch(:type).to_sym
  @tables = args.fetch(: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/driver/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/driver/sqlite3/table.rb', line 2

def type
  @type
end

Instance Method Details

#clone(newname, args = nil) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 165

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

  sql = "CREATE TABLE `#{newname}` ("
  first = true
  columns.each do |col|
    sql << ", " unless first
    first = false if first
    sql << @db.columns.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 |index|
    index_name = index.name.gsub(/\A#{Regexp.escape(name)}_/, "")

    if @db.opts[:index_append_table_name] && (match = index_name.match(/\A(.+?)__(.+)\Z/))
      index_name = match[2]
    else
      # Two indexes with the same name can't exist, and we are cloning, so we need to change the name
      index_name = "#{newname}_#{index_name}"
    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:



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

def column(name)
  columns do |column|
    return column if column.name == name.to_s
  end

  raise Baza::Errors::ColumnNotFound, "Column not found: #{name}"
end

#columns ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 89

def columns
  @db.columns
  ret = []

  @db.query("PRAGMA table_info(`#{@db.escape_table(name)}`)") do |d_cols|
    column_name = d_cols.fetch(:name)
    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 << obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#copy(args = {}) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 207

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

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

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

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

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

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

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

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

    sql << "`#{col.name}`"

    next unless args[:news]
    args[:news].each do |col_data|
      sql << ", ''" if col_data[:after] && col_data[:after] == col.name
    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/driver/sqlite3/table.rb', line 130

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

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

    if col_data[:after] && col_data[:after] == name
      sql << ", #{@db.columns.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 << ", " unless first
    first = false if first

    sql << "`#{name}`"

    sql << ", ''" if col_data[:after] && col_data[:after] == name
  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/driver/sqlite3/table.rb', line 120

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 `#{name}` ADD COLUMN #{@db.columns.data_sql(col_data)};")
    # end
  end
end

#create_indexes(index_arr, args = nil) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 320

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

  index_arr.each do |index_data|
    if index_data.is_a?(String) || 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?

    index_name = index_data.fetch(:name).to_s
    index_name = "#{name}__#{index_name}" if @db.opts[:index_append_table_name] && !index_name.start_with?("#{name}__")

    sql = "CREATE"
    sql << " UNIQUE" if index_data[:unique]
    sql << " INDEX #{@db.sep_index}#{@db.escape_column(index_name)}#{@db.sep_index} ON #{@db.sep_table}#{@db.escape_table(name)}#{@db.sep_table} ("

    first = true
    index_data.fetch(:columns).each do |col_name|
      sql << ", " unless first
      first = false if first
      sql << "#{@db.sep_col}#{@db.escape_column(col_name)}#{@db.sep_col}"
    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/driver/sqlite3/table.rb', line 361

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

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

  indexes do |index|
    ret[:indexes] << index.data unless index.name == "PRIMARY"
  end

  ret
end

#drop ⇒ Object

Drops the table from the database.



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# File 'lib/baza/driver/sqlite3/table.rb', line 32

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:



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# File 'lib/baza/driver/sqlite3/table.rb', line 259

def index(index_name)
  index_name = index_name.to_s

  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_i|
    return index_i if index_i.name == "#{name}__#{index_name}"
    return index_i if index_i.name == index_name
  end

  raise Baza::Errors::IndexNotFound, "Index not found: #{index_name}."
end

#indexes ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 282

def indexes
  @db.indexes
  ret = [] unless block_given?

  @db.query("PRAGMA index_list(`#{@db.escape_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 << obj
    end
  end

  if block_given?
    return nil
  else
    return ret
  end
end

#insert(data, args = {}) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 379

def insert(data, args = {})
  @db.insert(name, data, args)
end

#inspect ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 387

def inspect
  to_s
end

#maxlength ⇒ Object 



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

def maxlength
  @data.fetch(:maxlength)
end

#native? ⇒ Boolean

Returns true if the table is safe to drop.

Returns:

  • (Boolean) 


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# File 'lib/baza/driver/sqlite3/table.rb', line 39

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

#optimize ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 44

def optimize
  # Not possible in SQLite3.
end

#reload ⇒ Object

Raises:



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

def reload
  data = @db.select("sqlite_master", {type: "table", name: name}, orderby: "name").fetch
  raise Baza::Errors::TableNotFound unless data
  @data = data
  self
end

#rename(newname) ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 48

def rename(newname)
  newname = newname.to_s

  @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/driver/sqlite3/table.rb', line 26

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

#table ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 77

def table
  @db.tables[@table_name]
end

#to_s ⇒ Object 



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# File 'lib/baza/driver/sqlite3/table.rb', line 383

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

#truncate ⇒ Object

Drops the table and creates it again



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# File 'lib/baza/driver/sqlite3/table.rb', line 70

def truncate
  table_data = data
  drop
  @db.tables.create(table_data.delete(:name), table_data)
  self
end