Class: Baza::Driver::Pg::Tables

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Tables

#exists?

Constructor Details

#initialize(args) ⇒ Tables

Returns a new instance of Tables.



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

def initialize(args)
  @args = args
  @db = @args.fetch(:db)
end

Instance Attribute Details

#db ⇒ Object (readonly)

Returns the value of attribute db.



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# File 'lib/baza/driver/pg/tables.rb', line 2

def db
  @db
end

Instance Method Details

#[](table_name) ⇒ Object

Raises:



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# File 'lib/baza/driver/pg/tables.rb', line 9

def [](table_name)
  table = list(name: table_name).first
  raise Baza::Errors::TableNotFound unless table
  table
end

#create(table_name, columns:, indexes: nil, return_sql: false, temp: false) ⇒ Object 



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# File 'lib/baza/driver/pg/tables.rb', line 42

def create(table_name, columns:, indexes: nil, return_sql: false, temp: false)
  table_name = table_name.to_s
  raise "Invalid table name: #{table_name}" if table_name.strip.empty?
  raise "No columns was given for '#{table_name}'." if !columns || columns.empty?

  create_table_sql = "CREATE"
  create_table_sql << " TEMPORARY" if temp
  create_table_sql << " TABLE #{db.quote_table(table_name)} ("

  first = true
  columns.each do |col_data|
    create_table_sql << ", " unless first
    first = false if first
    col_data.delete(:after) if col_data[:after]
    create_table_sql << db.columns.data_sql(col_data)
  end

  columns.each do |col_data| # rubocop :disable Style/CombinableLoops
    next unless col_data.key?(:foreign_key)

    create_table_sql << ","
    create_table_sql << " CONSTRAINT #{col_data.fetch(:foreign_key).fetch(:name)}" if col_data.fetch(:foreign_key)[:name]
    create_table_sql << " FOREIGN KEY (#{col_data.fetch(:name)}) " \
      "REFERENCES #{col_data.fetch(:foreign_key).fetch(:to).fetch(0)} (#{col_data.fetch(:foreign_key).fetch(:to).fetch(1)})"
  end

  create_table_sql << ")"

  sqls = [create_table_sql]

  if indexes && !indexes.empty?
    sqls += db.indexes.create_index(indexes, table_name: table_name, return_sql: true)
  end

  return sqls if return_sql

  db.transaction do
    sqls.each do |sql|
      db.query(sql)
    end
  end
end

#list(args = {}) ⇒ Object 



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# File 'lib/baza/driver/pg/tables.rb', line 15

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

  where_args = {
    table_catalog: @db.opts[:db],
    table_schema: "public"
  }
  where_args[:table_name] = args.fetch(:name) if args[:name]

  @db.select([:information_schema, :tables], where_args, orderby: :table_name) do |table_data|
    table = Baza::Driver::Pg::Table.new(
      driver: @db.driver,
      data: table_data
    )

    next if table.native?

    if tables_list
      tables_list << table
    else
      yield table
    end
  end

  tables_list
end