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How to use transaction method of ClassMethods Package

Best Active_mocker_ruby code snippet using ClassMethods.transaction

datastore.rb

Source:datastore.rb

...87        class RunQueryResponse88          include ::Google::Protobuf::MessageExts89          extend ::Google::Protobuf::MessageExts::ClassMethods90        end91        # The request for {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction}.92        # @!attribute [rw] project_id93        #   @return [::String]94        #     Required. The ID of the project against which to make the request.95        # @!attribute [rw] transaction_options96        #   @return [::Google::Cloud::Datastore::V1::TransactionOptions]97        #     Options for a new transaction.98        class BeginTransactionRequest99          include ::Google::Protobuf::MessageExts100          extend ::Google::Protobuf::MessageExts::ClassMethods101        end102        # The response for {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction}.103        # @!attribute [rw] transaction104        #   @return [::String]105        #     The transaction identifier (always present).106        class BeginTransactionResponse107          include ::Google::Protobuf::MessageExts108          extend ::Google::Protobuf::MessageExts::ClassMethods109        end110        # The request for {::Google::Cloud::Datastore::V1::Datastore::Client#rollback Datastore.Rollback}.111        # @!attribute [rw] project_id112        #   @return [::String]113        #     Required. The ID of the project against which to make the request.114        # @!attribute [rw] transaction115        #   @return [::String]116        #     Required. The transaction identifier, returned by a call to117        #     {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction}.118        class RollbackRequest119          include ::Google::Protobuf::MessageExts120          extend ::Google::Protobuf::MessageExts::ClassMethods121        end122        # The response for {::Google::Cloud::Datastore::V1::Datastore::Client#rollback Datastore.Rollback}.123        # (an empty message).124        class RollbackResponse125          include ::Google::Protobuf::MessageExts126          extend ::Google::Protobuf::MessageExts::ClassMethods127        end128        # The request for {::Google::Cloud::Datastore::V1::Datastore::Client#commit Datastore.Commit}.129        # @!attribute [rw] project_id130        #   @return [::String]131        #     Required. The ID of the project against which to make the request.132        # @!attribute [rw] mode133        #   @return [::Google::Cloud::Datastore::V1::CommitRequest::Mode]134        #     The type of commit to perform. Defaults to `TRANSACTIONAL`.135        # @!attribute [rw] transaction136        #   @return [::String]137        #     The identifier of the transaction associated with the commit. A138        #     transaction identifier is returned by a call to139        #     {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction}.140        # @!attribute [rw] mutations141        #   @return [::Array<::Google::Cloud::Datastore::V1::Mutation>]142        #     The mutations to perform.143        #144        #     When mode is `TRANSACTIONAL`, mutations affecting a single entity are145        #     applied in order. The following sequences of mutations affecting a single146        #     entity are not permitted in a single `Commit` request:147        #148        #     - `insert` followed by `insert`149        #     - `update` followed by `insert`150        #     - `upsert` followed by `insert`151        #     - `delete` followed by `update`152        #153        #     When mode is `NON_TRANSACTIONAL`, no two mutations may affect a single154        #     entity.155        class CommitRequest156          include ::Google::Protobuf::MessageExts157          extend ::Google::Protobuf::MessageExts::ClassMethods158          # The modes available for commits.159          module Mode160            # Unspecified. This value must not be used.161            MODE_UNSPECIFIED = 0162            # Transactional: The mutations are either all applied, or none are applied.163            # Learn about transactions164            # [here](https://cloud.google.com/datastore/docs/concepts/transactions).165            TRANSACTIONAL = 1166            # Non-transactional: The mutations may not apply as all or none.167            NON_TRANSACTIONAL = 2168          end169        end170        # The response for {::Google::Cloud::Datastore::V1::Datastore::Client#commit Datastore.Commit}.171        # @!attribute [rw] mutation_results172        #   @return [::Array<::Google::Cloud::Datastore::V1::MutationResult>]173        #     The result of performing the mutations.174        #     The i-th mutation result corresponds to the i-th mutation in the request.175        # @!attribute [rw] index_updates176        #   @return [::Integer]177        #     The number of index entries updated during the commit, or zero if none were178        #     updated.179        # @!attribute [rw] commit_time180        #   @return [::Google::Protobuf::Timestamp]181        #     The transaction commit timestamp. Not set for non-transactional commits.182        class CommitResponse183          include ::Google::Protobuf::MessageExts184          extend ::Google::Protobuf::MessageExts::ClassMethods185        end186        # The request for {::Google::Cloud::Datastore::V1::Datastore::Client#allocate_ids Datastore.AllocateIds}.187        # @!attribute [rw] project_id188        #   @return [::String]189        #     Required. The ID of the project against which to make the request.190        # @!attribute [rw] keys191        #   @return [::Array<::Google::Cloud::Datastore::V1::Key>]192        #     Required. A list of keys with incomplete key paths for which to allocate IDs.193        #     No key may be reserved/read-only.194        class AllocateIdsRequest195          include ::Google::Protobuf::MessageExts196          extend ::Google::Protobuf::MessageExts::ClassMethods197        end198        # The response for {::Google::Cloud::Datastore::V1::Datastore::Client#allocate_ids Datastore.AllocateIds}.199        # @!attribute [rw] keys200        #   @return [::Array<::Google::Cloud::Datastore::V1::Key>]201        #     The keys specified in the request (in the same order), each with202        #     its key path completed with a newly allocated ID.203        class AllocateIdsResponse204          include ::Google::Protobuf::MessageExts205          extend ::Google::Protobuf::MessageExts::ClassMethods206        end207        # The request for {::Google::Cloud::Datastore::V1::Datastore::Client#reserve_ids Datastore.ReserveIds}.208        # @!attribute [rw] project_id209        #   @return [::String]210        #     Required. The ID of the project against which to make the request.211        # @!attribute [rw] database_id212        #   @return [::String]213        #     If not empty, the ID of the database against which to make the request.214        # @!attribute [rw] keys215        #   @return [::Array<::Google::Cloud::Datastore::V1::Key>]216        #     Required. A list of keys with complete key paths whose numeric IDs should not be217        #     auto-allocated.218        class ReserveIdsRequest219          include ::Google::Protobuf::MessageExts220          extend ::Google::Protobuf::MessageExts::ClassMethods221        end222        # The response for {::Google::Cloud::Datastore::V1::Datastore::Client#reserve_ids Datastore.ReserveIds}.223        class ReserveIdsResponse224          include ::Google::Protobuf::MessageExts225          extend ::Google::Protobuf::MessageExts::ClassMethods226        end227        # A mutation to apply to an entity.228        # @!attribute [rw] insert229        #   @return [::Google::Cloud::Datastore::V1::Entity]230        #     The entity to insert. The entity must not already exist.231        #     The entity key's final path element may be incomplete.232        # @!attribute [rw] update233        #   @return [::Google::Cloud::Datastore::V1::Entity]234        #     The entity to update. The entity must already exist.235        #     Must have a complete key path.236        # @!attribute [rw] upsert237        #   @return [::Google::Cloud::Datastore::V1::Entity]238        #     The entity to upsert. The entity may or may not already exist.239        #     The entity key's final path element may be incomplete.240        # @!attribute [rw] delete241        #   @return [::Google::Cloud::Datastore::V1::Key]242        #     The key of the entity to delete. The entity may or may not already exist.243        #     Must have a complete key path and must not be reserved/read-only.244        # @!attribute [rw] base_version245        #   @return [::Integer]246        #     The version of the entity that this mutation is being applied247        #     to. If this does not match the current version on the server, the248        #     mutation conflicts.249        # @!attribute [rw] update_time250        #   @return [::Google::Protobuf::Timestamp]251        #     The update time of the entity that this mutation is being applied252        #     to. If this does not match the current update time on the server, the253        #     mutation conflicts.254        class Mutation255          include ::Google::Protobuf::MessageExts256          extend ::Google::Protobuf::MessageExts::ClassMethods257        end258        # The result of applying a mutation.259        # @!attribute [rw] key260        #   @return [::Google::Cloud::Datastore::V1::Key]261        #     The automatically allocated key.262        #     Set only when the mutation allocated a key.263        # @!attribute [rw] version264        #   @return [::Integer]265        #     The version of the entity on the server after processing the mutation. If266        #     the mutation doesn't change anything on the server, then the version will267        #     be the version of the current entity or, if no entity is present, a version268        #     that is strictly greater than the version of any previous entity and less269        #     than the version of any possible future entity.270        # @!attribute [rw] update_time271        #   @return [::Google::Protobuf::Timestamp]272        #     The update time of the entity on the server after processing the mutation.273        #     If the mutation doesn't change anything on the server, then the timestamp274        #     will be the update timestamp of the current entity. This field will not be275        #     set after a 'delete'.276        # @!attribute [rw] conflict_detected277        #   @return [::Boolean]278        #     Whether a conflict was detected for this mutation. Always false when a279        #     conflict detection strategy field is not set in the mutation.280        class MutationResult281          include ::Google::Protobuf::MessageExts282          extend ::Google::Protobuf::MessageExts::ClassMethods283        end284        # The options shared by read requests.285        # @!attribute [rw] read_consistency286        #   @return [::Google::Cloud::Datastore::V1::ReadOptions::ReadConsistency]287        #     The non-transactional read consistency to use.288        #     Cannot be set to `STRONG` for global queries.289        # @!attribute [rw] transaction290        #   @return [::String]291        #     The identifier of the transaction in which to read. A292        #     transaction identifier is returned by a call to293        #     {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction}.294        # @!attribute [rw] read_time295        #   @return [::Google::Protobuf::Timestamp]296        #     Reads entities as they were at the given time. This may not be older297        #     than 270 seconds.  This value is only supported for Cloud Firestore in298        #     Datastore mode.299        class ReadOptions300          include ::Google::Protobuf::MessageExts301          extend ::Google::Protobuf::MessageExts::ClassMethods302          # The possible values for read consistencies.303          module ReadConsistency304            # Unspecified. This value must not be used.305            READ_CONSISTENCY_UNSPECIFIED = 0306            # Strong consistency.307            STRONG = 1308            # Eventual consistency.309            EVENTUAL = 2310          end311        end312        # Options for beginning a new transaction.313        #314        # Transactions can be created explicitly with calls to315        # {::Google::Cloud::Datastore::V1::Datastore::Client#begin_transaction Datastore.BeginTransaction} or implicitly by setting316        # [ReadOptions.new_transaction][google.datastore.v1.ReadOptions.new_transaction] in read requests.317        # @!attribute [rw] read_write318        #   @return [::Google::Cloud::Datastore::V1::TransactionOptions::ReadWrite]319        #     The transaction should allow both reads and writes.320        # @!attribute [rw] read_only321        #   @return [::Google::Cloud::Datastore::V1::TransactionOptions::ReadOnly]322        #     The transaction should only allow reads.323        class TransactionOptions324          include ::Google::Protobuf::MessageExts325          extend ::Google::Protobuf::MessageExts::ClassMethods326          # Options specific to read / write transactions.327          # @!attribute [rw] previous_transaction328          #   @return [::String]329          #     The transaction identifier of the transaction being retried.330          class ReadWrite331            include ::Google::Protobuf::MessageExts332            extend ::Google::Protobuf::MessageExts::ClassMethods333          end334          # Options specific to read-only transactions.335          # @!attribute [rw] read_time336          #   @return [::Google::Protobuf::Timestamp]337          #     Reads entities at the given time.338          #     This may not be older than 60 seconds.339          class ReadOnly340            include ::Google::Protobuf::MessageExts341            extend ::Google::Protobuf::MessageExts::ClassMethods342          end343        end344      end345    end346  end347end...

transactions.rb

Source:transactions.rb

...7    def self.included(base)8      base.extend(ClassMethods)9      base.class_eval do10        [:destroy, :save, :save!].each do |method|11          alias_method_chain method, :transactions12        end13      end14    end15    # Transactions are protective blocks where SQL statements are only permanent16    # if they can all succeed as one atomic action. The classic example is a17    # transfer between two accounts where you can only have a deposit if the18    # withdrawal succeeded and vice versa. Transactions enforce the integrity of19    # the database and guard the data against program errors or database20    # break-downs. So basically you should use transaction blocks whenever you21    # have a number of statements that must be executed together or not at all.22    # Example:23    #24    #   ActiveRecord::Base.transaction do25    #     david.withdrawal(100)26    #     mary.deposit(100)27    #   end28    #29    # This example will only take money from David and give to Mary if neither30    # +withdrawal+ nor +deposit+ raises an exception. Exceptions will force a31    # ROLLBACK that returns the database to the state before the transaction was32    # begun. Be aware, though, that the objects will _not_ have their instance33    # data returned to their pre-transactional state.34    #35    # == Different Active Record classes in a single transaction36    #37    # Though the transaction class method is called on some Active Record class,38    # the objects within the transaction block need not all be instances of39    # that class. This is because transactions are per-database connection, not40    # per-model.41    #42    # In this example a <tt>Balance</tt> record is transactionally saved even43    # though <tt>transaction</tt> is called on the <tt>Account</tt> class:44    #45    #   Account.transaction do46    #     balance.save!47    #     account.save!48    #   end49    #50    # Note that the +transaction+ method is also available as a model instance51    # method. For example, you can also do this:52    #53    #   balance.transaction do54    #     balance.save!55    #     account.save!56    #   end57    #58    # == Transactions are not distributed across database connections59    #60    # A transaction acts on a single database connection.  If you have61    # multiple class-specific databases, the transaction will not protect62    # interaction among them.  One workaround is to begin a transaction63    # on each class whose models you alter:64    #65    #   Student.transaction do66    #     Course.transaction do67    #       course.enroll(student)68    #       student.units += course.units69    #     end70    #   end71    #72    # This is a poor solution, but full distributed transactions are beyond73    # the scope of Active Record.74    #75    # == Save and destroy are automatically wrapped in a transaction76    #77    # Both Base#save and Base#destroy come wrapped in a transaction that ensures78    # that whatever you do in validations or callbacks will happen under the79    # protected cover of a transaction. So you can use validations to check for80    # values that the transaction depends on or you can raise exceptions in the81    # callbacks to rollback, including <tt>after_*</tt> callbacks.82    #83    # == Exception handling and rolling back84    #85    # Also have in mind that exceptions thrown within a transaction block will86    # be propagated (after triggering the ROLLBACK), so you should be ready to87    # catch those in your application code.88    #89    # One exception is the ActiveRecord::Rollback exception, which will trigger90    # a ROLLBACK when raised, but not be re-raised by the transaction block.91    #92    # *Warning*: one should not catch ActiveRecord::StatementInvalid exceptions93    # inside a transaction block. StatementInvalid exceptions indicate that an94    # error occurred at the database level, for example when a unique constraint95    # is violated. On some database systems, such as PostgreSQL, database errors96    # inside a transaction causes the entire transaction to become unusable97    # until it's restarted from the beginning. Here is an example which98    # demonstrates the problem:99    #100    #   # Suppose that we have a Number model with a unique column called 'i'.101    #   Number.transaction do102    #     Number.create(:i => 0)103    #     begin104    #       # This will raise a unique constraint error...105    #       Number.create(:i => 0)106    #     rescue ActiveRecord::StatementInvalid107    #       # ...which we ignore.108    #     end109    #     110    #     # On PostgreSQL, the transaction is now unusable. The following111    #     # statement will cause a PostgreSQL error, even though the unique112    #     # constraint is no longer violated:113    #     Number.create(:i => 1)114    #     # => "PGError: ERROR:  current transaction is aborted, commands115    #     #     ignored until end of transaction block"116    #   end117    #118    # One should restart the entire transaction if a StatementError occurred.119    module ClassMethods120      # See ActiveRecord::Transactions::ClassMethods for detailed documentation.121      def transaction(&block)122        connection.increment_open_transactions123        begin124          connection.transaction(connection.open_transactions == 1, &block)125        ensure126          connection.decrement_open_transactions127        end128      end129    end130    # See ActiveRecord::Transactions::ClassMethods for detailed documentation.131    def transaction(&block)132      self.class.transaction(&block)133    end134    def destroy_with_transactions #:nodoc:135      with_transaction_returning_status(:destroy_without_transactions)136    end137    def save_with_transactions(perform_validation = true) #:nodoc:138      rollback_active_record_state! { with_transaction_returning_status(:save_without_transactions, perform_validation) }139    end140    def save_with_transactions! #:nodoc:141      rollback_active_record_state! { transaction { save_without_transactions! } }142    end143    # Reset id and @new_record if the transaction rolls back.144    def rollback_active_record_state!145      id_present = has_attribute?(self.class.primary_key)146      previous_id = id147      previous_new_record = new_record?148      yield149    rescue Exception150      @new_record = previous_new_record151      if id_present152        self.id = previous_id153      else154        @attributes.delete(self.class.primary_key)155        @attributes_cache.delete(self.class.primary_key)156      end157      raise158    end159    # Executes +method+ within a transaction and captures its return value as a160    # status flag. If the status is true the transaction is committed, otherwise161    # a ROLLBACK is issued. In any case the status flag is returned.162    #163    # This method is available within the context of an ActiveRecord::Base164    # instance.165    def with_transaction_returning_status(method, *args)166      status = nil167      transaction do168        status = send(method, *args)169        raise ActiveRecord::Rollback unless status170      end171      status172    end173  end174end...

active_record.rb

Source:active_record.rb

...6require 'ar_cache/active_record/insert_all'7require 'ar_cache/active_record/associations/association'8require 'ar_cache/active_record/associations/singular_association'9require 'ar_cache/active_record/associations/has_one_through_association'10require 'ar_cache/active_record/connection_adapters/abstract/transaction'11require 'ar_cache/active_record/connection_adapters/abstract/database_statements'12# rubocop:disable Layout/LineLength13ActiveSupport.on_load(:active_record, run_once: true) do14  ActiveRecord::Core::ClassMethods.prepend(ArCache::ActiveRecord::Core::ClassMethods)15  ActiveRecord::ModelSchema.prepend(ArCache::ActiveRecord::ModelSchema)16  ActiveRecord::ModelSchema::ClassMethods.prepend(ArCache::ActiveRecord::ModelSchema::ClassMethods)17  ActiveRecord::Persistence.prepend(ArCache::ActiveRecord::Persistence)18  ActiveRecord::Persistence::ClassMethods.prepend(ArCache::ActiveRecord::Persistence::ClassMethods)19  ActiveRecord::InsertAll.prepend(ArCache::ActiveRecord::InsertAll)20  ActiveRecord::Relation.prepend(ArCache::ActiveRecord::Relation)21  ActiveRecord::Associations::Association.prepend(ArCache::ActiveRecord::Associations::Association)22  ActiveRecord::Associations::SingularAssociation.prepend(ArCache::ActiveRecord::Associations::SingularAssociation)23  ActiveRecord::Associations::HasOneThroughAssociation.prepend(ArCache::ActiveRecord::Associations::HasOneThroughAssociation)24  ActiveRecord::ConnectionAdapters::NullTransaction.prepend(ArCache::ActiveRecord::ConnectionAdapters::NullTransaction)...

transaction

Using AI Code Generation

1 def self.included(base)2 base.extend(ClassMethods)3 def self.included(base)4 base.extend(ClassMethods)

transaction

Using AI Code Generation

1  def self.included(base)2    base.extend(ClassMethods)3  def self.included(base)4    base.extend(ClassMethods)5  def self.included(base)6    base.extend(ClassMethods)7  def self.included(base)8    base.extend(ClassMethods)

transaction

Using AI Code Generation

1  def transaction(&block)2    self.class.transaction(&block)3    def transaction(&block)4      ActiveRecord::Base.transaction(&block)5  def self.included(receiver)6  def transaction(&block)7    self.class.transaction(&block)8    def transaction(&block)9      ActiveRecord::Base.transaction(&block)10  def self.included(receiver)11  def transaction(&block)12    self.class.transaction(&block)13    def transaction(&block)14      ActiveRecord::Base.transaction(&block)15  def self.included(receiver)16  def transaction(&block)17    self.class.transaction(&block)18    def transaction(&block)19      ActiveRecord::Base.transaction(&block)

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