Cassandra Datastax Ruby 插入错误

Question

我在使用 cassandra 的 ruby​​ 中插入查询时遇到问题，

这是我的桌子：

CREATE TABLE testkeyspace.ticket (
    id int,
    uid text,
    annule boolean,
    avoir decimal,
    caisse int,
    clotureid int,
    couverts decimal,
    creation_iso timestamp,
    modif_iso timestamp,
    montantencaisse decimal,
    montantttc decimal,
    nb_articles int,
    numero int,
    remise decimal,
    remise_montant decimal,
    remise_type text,
    remise_valeur decimal,
    rendu decimal,
    stats_iso timestamp,
    PRIMARY KEY (id, uid)
) 

在 ruby​​ 中我做了一个准备声明：

insert_table_ticket = session.prepare("INSERT INTO ticket(id, uid, annule, avoir, caisse, clotureid, couverts,creation_iso, modif_iso, montantencaisse, montantttc, nb_articles, numero, remise,remise_montant, remise_type, remise_valeur, rendu,stats_iso) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)")

我把这些值用于测试：

session.execute(insert_table_ticket,
                      1,
                      "test",
                      true,
                      1.1,
                      1,
                      1,
                      1.0,
                      1415350203,
                      1415350203,
                      1.1,
                      1.1,
                      1,
                      1,
                      1.1,
                      1.1,
                      "tests",
                      1.1,
                      1.1,
                      1415350203
      )

我收到了这个错误：

/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/cql_byte_buffer.rb:275:in to_s': wrong number of arguments (1 for 0) (ArgumentError) from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/cql_byte_buffer.rb:275:inappend_decimal ' 来自/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/type_converter.rb:287:in decimal_to_bytes' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/type_converter.rb:85:incall' 来自 /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/type_converter.rb:85:in to_bytes' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/requests/execute_request.rb:93:inblock in encode_values ' 来自/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/requests/execute_request.rb:92:in each' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/requests/execute_request.rb:92:ineach_with_index ' 来自/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/requests/execute_request.rb:92:in encode_values' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/protocol/requests/execute_request.rb:39:ininitialize ' 来自/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/cluster/client.rb:190:in new' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/cluster/client.rb:190:inexecute' 来自/home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/session.rb:81:in execute_async' from /home/florian/.rvm/gems/ruby-2.1.4/gems/cassandra-driver-1.0.0.rc.1/lib/cassandra/session.rb:103:inexecute' 来自/home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:60:in block (3 levels) in <top (required)>' from /home/florian/.rvm/rubies/ruby-2.1.4/lib/ruby/2.1.0/benchmark.rb:279:inmeasure' 来自 /home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:35:in block (2 levels) in <top (required)>' from /home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:34:ineach' 来自 /home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:34:in block in <top (required)>' from /home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:33:inexecute' 来自 /home/florian/Projects/hadoop-ticket-server/import_cassandra.rb:33:in <top (required)>' from -e:1:inload' 从 -e:1:in `'

你知道我的问题吗？谢谢你

Answer 1

问题出在浮点数上。

Ruby 中的 float 在 cassandra 中被解释为 double 或 float。 要将小数放入 cassandra，我们必须将 BigDecimal 放入 Ruby。

来源：“http://datastax.github.io/ruby-driver/features/basics/”

解决方案：

session.execute(insert_table_ticket,
                  1,
                  "test",
                  true,
                  BigDecimal.new('1.1'),
                  1,
                  1,
                  BigDecimal.new('1.0'),
                  1415350203,
                  1415350203,
                  BigDecimal.new('1.1'),
                  BigDecimal.new('1.1'),
                  1,
                  1,
                  BigDecimal.new('1.1'),
                  BigDecimal.new('1.1'),
                  "tests",
                  BigDecimal.new('1.1'),
                  BigDecimal.new('1.1'),
                  1415350203
  )