Module: ActiveRecord::InsertManyStatement

Defined in:
lib/activerecord/insert_many.rb

Instance Method Summary collapse

Instance Method Details

#cast_result(result, table_name) ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
 
# File 'lib/activerecord/insert_many.rb', line 90

def cast_result(result, table_name)
  types_by_column = result.fields.each_with_object({}) do |column_name, types|
    types[column_name] = lookup_cast_type_from_column(columns(table_name).find { |column| column.name == column_name })
  end

  result.to_a.map { |row|
    Hash[row.map { |column_name, value|
      [ column_name, types_by_column[column_name].deserialize(value) ]
    }]
  }
end

#insert_many(fixtures, table_name = self.table_name, options = {}) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/activerecord/insert_many.rb', line 14

def insert_many(fixtures, table_name=self.table_name, options={})
  returning = options[:returning]
  if returning
    raise ArgumentError, "To use :returning, you must be using Postgres" unless supports_returning?
  elsif supports_returning?
    primary_keys = schema_cache.primary_keys(table_name)
    returning = Array(primary_keys) if primary_keys
  end
  return returning && [] if fixtures.empty?

  sql = insert_many_sql(fixtures, table_name, options.merge(returning: returning))

  result = execute sql, "Fixture Insert"

  returning ? cast_result(result, table_name) : result
end

#insert_many_sql(fixtures, table_name, options = {}) ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/activerecord/insert_many.rb', line 31

def insert_many_sql(fixtures, table_name, options={})
  returning = options[:returning]

  columns = schema_cache.columns_hash(table_name)

  sample = fixtures.first
  key_list = sample.map { |name, _value| quote_column_name(name) }
  returning = returning.map { |name| quote_column_name(name) } if returning

  value_lists = fixtures.map do |fixture|

    binds = fixture.map do |name, value|
      name = name.to_s
      if column = columns[name]
        type = lookup_cast_type_from_column(column)
        Relation::QueryAttribute.new(name, value, type)
      else
        raise Fixture::FixtureError, %(table "#{table_name}" has no column named #{name.inspect}.)
      end
    end

    binds.map(&:value_for_database).map do |value|
      begin
        quote(value)
      rescue TypeError
        quote(YAML.dump(value))
      end
    end
  end

  sql = "INSERT INTO #{quote_table_name(table_name)} (#{key_list.join(",")}) VALUES #{value_lists.map { |value| "(#{value.join(",")})" }.join(", ")}"

  if conflict = options[:on_conflict]
    raise ArgumentError, "To use the :on_conflict option, you must be using Postgres >= 9.5" unless supports_on_conflict?

    conflict_columns = Array.wrap(conflict.fetch(:column, schema_cache.primary_keys(table_name)))
    raise ArgumentError, "To use the :on_conflict option, you must specify :column" unless conflict_columns.any?

    conflict_do = conflict.fetch(:do)
    raise ArgumentError, "#{conflict_do.inspect} is an unknown value for conflict[:do]; must be :nothing or :update" unless [:nothing, :update].member?(conflict_do)

    conflict_columns = conflict_columns.map(&method(:quote_column_name))
    sql << " ON CONFLICT(#{conflict_columns.join(",")})"
    sql << " WHERE #{conflict[:where]}" if conflict[:where]

    if conflict_do == :nothing
      sql << " DO NOTHING"
    else
      primary_keys = Array(schema_cache.primary_keys(table_name)).map(&method(:quote_column_name))
      updatable_keys = key_list - conflict_columns - primary_keys
      sql << " DO UPDATE SET #{updatable_keys.map { |key| "#{key} = excluded.#{key}" }.join(", ")}"
    end
  end

  sql << " RETURNING #{returning.join(",")}" if returning

  sql
end

#supports_on_conflict? ⇒ Boolean

Returns:

  • (Boolean) 


102
103
104
 
# File 'lib/activerecord/insert_many.rb', line 102

def supports_on_conflict?
  self.class.name == "ActiveRecord::ConnectionAdapters::PostgreSQLAdapter" && postgresql_version >= 90500
end

#supports_returning? ⇒ Boolean

Returns:

  • (Boolean) 


106
107
108
 
# File 'lib/activerecord/insert_many.rb', line 106

def supports_returning?
  self.class.name == "ActiveRecord::ConnectionAdapters::PostgreSQLAdapter"
end