Module: ActiveRecord::Import::SQLite3Adapter

Includes:
ImportSupport
Included in:
ConnectionAdapters::SQLite3Adapter
Defined in:
lib/activerecord-import/adapters/sqlite3_adapter.rb

Constant Summary collapse

MIN_VERSION_FOR_IMPORT = 
"3.7.11".freeze
SQLITE_LIMIT_COMPOUND_SELECT = 
500

Instance Method Summary collapse

Instance Method Details

#insert_many(sql, values, _options = {}, *args) ⇒ Object

sql can be a single string or an array. If it is an array all elements that are in position >= 1 will be appended to the final SQL.



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# File 'lib/activerecord-import/adapters/sqlite3_adapter.rb', line 20

def insert_many( sql, values, _options = {}, *args ) # :nodoc:
  number_of_inserts = 0

  base_sql, post_sql = if sql.is_a?( String )
    [sql, '']
  elsif sql.is_a?( Array )
    [sql.shift, sql.join( ' ' )]
  end

  value_sets = ::ActiveRecord::Import::ValueSetsRecordsParser.parse(values,
    max_records: SQLITE_LIMIT_COMPOUND_SELECT)

  transaction(requires_new: true) do
    value_sets.each do |value_set|
      number_of_inserts += 1
      sql2insert = base_sql + value_set.join( ',' ) + post_sql
      insert( sql2insert, *args )
    end
  end

  [number_of_inserts, []]
end

#next_value_for_sequence(sequence_name) ⇒ Object 



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# File 'lib/activerecord-import/adapters/sqlite3_adapter.rb', line 52

def next_value_for_sequence(sequence_name)
  %{nextval('#{sequence_name}')}
end

#pre_sql_statements(options) ⇒ Object 



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# File 'lib/activerecord-import/adapters/sqlite3_adapter.rb', line 43

def pre_sql_statements( options)
  sql = []
  # Options :recursive and :on_duplicate_key_ignore are mutually exclusive
  if (options[:ignore] || options[:on_duplicate_key_ignore]) && !options[:recursive]
    sql << "OR IGNORE"
  end
  sql + super
end

#supports_import?(current_version = sqlite_version) ⇒ Boolean

Override our conformance to ActiveRecord::Import::ImportSupport interface to ensure that we only support import in supported version of SQLite. Which INSERT statements with multiple value sets was introduced in 3.7.11.

Returns:

  • (Boolean) 


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# File 'lib/activerecord-import/adapters/sqlite3_adapter.rb', line 10

def supports_import?(current_version = sqlite_version)
  if current_version >= MIN_VERSION_FOR_IMPORT
    true
  else
    false
  end
end