similar to: update_Attributes stale Object error

Hi all, I''ve searched the forumns, but I can''t seem to find an answer to this one. I''m having trouble getting optimistic locking (OL) to work in my app, even though all of the pieces are there: * table has lock_version column, with default of 0 (zero) * lock_version column is being incremented by the first update (but the second doesn''t catch it) *

I''m running into a couple of stale object problems with methods that at first glance appear fairly atomic - eg Message.update(params[:id], {:body => params[:value]}) Of course, Rails has to instantiate the object & validate it before it updates the database, so it''s not actually atomic, hence the occasional staleobject error. So I''ve been wondering about

The error is caused by the save! method updating an object that another thread (most likely in taskomatic) already updated. In the case of this race condition, we retry saving. However, a proper fix would involve fixing the locking. --- src/db-omatic/db_omatic.rb | 23 ++++++++++++++++++++--- 1 files changed, 20 insertions(+), 3 deletions(-) diff --git a/src/db-omatic/db_omatic.rb

Hi All, I''m having some trouble deciding when and how to implement optimistic locking. Let''s say I have a multiuser Rails app, and let''s say it stores, among other things "vital" customer information. The standard methods created by the Rails generate scaffold script look like this: def edit @customer = Customer.find(params[:id]) end

Hi, I m trying to link into the process of setting an belongs_to attribute in my model. Unfortunetly, it does not seem to be as easy as for "normal" attributes. I ve tried the following: class Treatment < ActiveRecord::Base belongs_to :drug def drug=(new_value) ''my stuff super new_value end However, that does not work. Ive also tried self[:drug] =

All, I''ve written a simple job/opportunity tracking database app via RoR. I have about 10 internal users. Sometimes 2 people will want to update the same record at more or less the same time and they collide. In particular user 1 may edit a record, then get distracted, and finally an hour later they click save. During that hour user 2 may have pulled up the record, edited it, and

Hello, We recently upgraded to the latest Samba3 version v3.0.23c. If the Samba system and the AD belong to the same domain, I am able to perform a 'net ads join' by supplying either a 'Domain Admins' or a 'Domain Users' credential. However if the Samba system and the AD belong to different domain, I can perform the 'net ads join' by supplying a 'Domain

I am trying to configure idmap_ad on a linux member server (fedora core 23, samba 4.3.11) with a Windows 2008 domain controller. The domain is "MYDOMAIN.COM" with a child domain of "CHILD1.MYDOMAIN.COM." By default those domains trust each other. The MYDOMAIN PDC has the unix identity mapping feature installed, so I can use "active directory users and

Hello list, perhaps someone can guide me, finding out what's going wrong in the following scenario (Active Directory , Samba 3.0.20b same with 3.0.28a): CHILD1.CONTOSO.COM <-trusts-> CONTOSO.COM <-trusts->CHILD2.CONTOSO.COM | | | User: CHILD1\testtest | Samba

Hi all I have the following models: class member has_and_belongs_to_many :disc_jockeys end class disc_jockey has_and_belongs_to_many :members end The relation table is called disc_jockeys_members and has the following fields: disc_jockeys_members(disc_jockey_id, member_id, status) So far, the field status can have values like valid, invalid, locked etc., but it is not regarded yet by

I am trying to add a child to a child using XML package in R. the following fails library(XML) node1 <- c("val1","val2","val3") names(node1) <- c("att1","att2","att3") root <- xmlNode("root", attrs=node1) node2 <- LETTERS[1:3] names(node2) <- paste("name",1:3,sep="") root <-

The first patch is a leftover from the switch to libxl__create_qemu_logfile, and while there it also handles possible errors when opening /dev/null. The second one is a fix for the issues present in do_daemonize. Thanks, Roger.

Hi all, I am rather new to R. Recently I have been trying to implement some tree algorithms in R. I used lists to model tree nodes. I thought something like this would work: parent <- list(); child <- list(); parent$child1 <- child; child$parent <- parent; When I tried to check whether a node is its parent's first child using "if

Big thanks. newXMLNode works great. Wonder why it is not included in the documentation. There is newXMLDoc and newXMLNamespace, but no mention of newXMLNode. Stephen From: Ben Tupper [mailto:btupper at bigelow.org] Sent: Wednesday, March 21, 2018 6:18 PM To: Bond, Stephen Cc: r-help Subject: Re: [R] how to add a child to a child in XML Hi, XML doesn't use the `$` to access child nodes.

Hi, XML doesn't use the `$` to access child nodes. Instead use either `[name]` to get a list of children of that name or `[[name]]` to get the just the first child of that name encountered in the genealogy. Thus for your example... > root$child1 NULL > root[['child1']] <child1 name1="A" name2="B" name3="C"/> On the other hand, you might

def test_check_for_validity post=County.new(:name=>"myname",:description=>"mydesc") assert post.save end above is the method and when i run unit test it is saying as 1) Failure: test_check_for_validity(CountyTest) [/test/unit/county_test.rb:10]: <false> is not true. what does it say i cannot under stand please help -- Karthik.k Mobile -

Hi, It's a reasonable question. The answer is that it actually is included, but there are many instances across packages where multiple functions are documented on a single help page. The following brings up such a page... (for XML_3.98-1.9) > library(XML) > ?newXMLNode You can see the same on line... https://www.rdocumentation.org/packages/XML/versions/3.98-1.9/topics/newXMLDoc

Just to clarify and hopefully catch the attention of the maintainer: The newXMLNode function is not mentioned in: https://cran.r-project.org/web/packages/XML/XML.pdf which supposedly describes all functions in the package. Stephen From: Ben Tupper [mailto:btupper at bigelow.org] Sent: Thursday, March 22, 2018 10:40 AM To: Bond, Stephen Cc: r-help Subject: Re: [R] how to add a child to a

Hi there, I''m running several VMs within Xen, and now I''m trying to create/revert snapshots of my VMs. Along with Xen and blktap2, another utility, vhd-util is also delivered, and according to its description, i guess I can use it to create/revert VM snapshots. To create a snapshot is actually easy, I just call |vhd-util snapshot -n aSnapShot.vhd -p theVMtoBackup.vhd | But

Hi! Say we have a rails active-record-based model called "instance" which can have different states - STOPPED, RUNNING, STARTING_UP, SHUTTING_DOWN, etc... There is a method #start which changes the instance state to STARTING_UP only if it is STOPPED. def start if self.state == STOPPED self.state = STARTING_UP self.save ... end end As you understand if we have multiple