I am a beginner with sequelize and cannot get the transactions to work. Documentation is unclear and makes the following example not able to adapt to my requirements.
First I have to insert a tuple in 'Conto', then insert another tuple in 'Preferenze' and finally based on the 'tipo' attribute insert a tuple in 'ContoPersonale' or 'ContoAziendale'. With a transaction you pass it to each query you want to be part of the transaction, and then call transaction.
Since none of your queries depend on each other you can also make them concurrently using Promise. Learn more. Asked 5 months ago. Active 5 months ago. Viewed times. If only one of these queries fails, the transaction must make a total rollback, commit. The queries are: Conto. Cadmos 19 19 bronze badges. Active Oldest Votes.
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I want to create a transaction and control which queries it will run. I want to do that using node 7. Here is a sample of the code I'm trying to run. This feature is desperately needed for code quality purposes and to ease the pain of testing with Sequelize at the moment. In my case the problem was a stupid mistake - missing await when calling the save.
Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. New issue. Jump to bottom. Copy link Quote reply. What you are doing? The transaction to complete What is actually happening?
I get this error- commit has been called on this transaction 3b1ab60acace-b89bc92ceyou can no longer use it. The rejected query is attached as the 'sql' property of this error btw, if I run my code without using transactions it works. Dialect: postgres Sequelize version: 4. This comment has been minimized.
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Sign in to view. In my case the problem was a stupid mistake - missing await when calling the save await entity. Sign up for free to join this conversation on GitHub. Already have an account?
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Already on GitHub? Sign in to your account. Dialect: postgres Database version: 9. I cannot reproduce the error. Obviously there was a timeout in connecting to the DB server, it doesn't look like a bug in Sequelize to me.
Tried the same endpoint and other credentials using pg-promise, and I was successfully connected. Could you tell what db server you tried it on?
Of course, the app connects to my local db. Own applications running on AWS that use Sequelize. I am sorry, but even if you can connect with pg-promise, I have no way to find out why it wouldn't work with Sequelize without a repro.
Already tried connecting to it using node-postgres and it worked, same error for sequelize though. Same issue here. The connection is established but when the connection of any connection is lost, the pool is getting smaller and after death of all threads application goes down. Also tried downgrade from 4.
I'm having the exact same issue! The above pool configuration did NOT work. It's been consistent for the last 27 days. It would be great to have this looked into more closely as it's a serious risk in the latest release. Also is likely related to the same problem. Thank you! Yeah, I'm having this same issue on a DigitalOcean server as well. I've tried the configuration from above with no luck. I am encountering the same problem on a DigitalOcean server.
Do you have any updates on this issue? Cheers philipdbrown for the solution. I have actually solved it in a dumb way by using setTimeout. It's not the most efficient method but it should do for now until they fix it. Along with using long timeout and fix inthis should be fixed. By the way, when i connecting to my local mysql database, I also got the same problem.
If anyone can submit a proper failing test case I will try resolve this. I cant help if I cant reproduce this issue :.
I'm having this same issue and I want to give a PR to reproduce this issue but I can not reproduce every time! My test code like:.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
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I can't see any reason, but I notice the find isn't using the transaction. I am not sure if that is significant or note. For find its Users. I think the main problem of the differing syntaxes is the confusion of users and the bug reports you"ll get, because it's not a self learning system.
Thanks for the help. The ideal solution, for me, would be to ignore the transaction completely. For example:. Then on "sequelize. Then when I call an operation e. As a developer all I am concerned about is demarcing the transaction boundary. I don't need to care about how it is propagated and passed in to each function call. How would that work having multiple transactions running alongside eachother? And how would it work with calls dependent on other calls etc, afaik there's no better model than this that supports concurrency atleast we haven't been able to find one - but also looking to be proven wrong :.
What do you mean by multiple transactions running alongside each other? Are you thinking within a single request or are you asking about concurrency? From all I've read it respects concurrency and is safe to use. When you use set and get it is against the current request. It is intended as an equivalent to ThreadLocal in Java. What do you mean by current request, current http request? There won't always be a request. Can you show me how you make sure defered and async follow up calls are in the same transaction?
I assume any code that runs in a new event loop would need to be wrapped in a synchronous closure that provides the transaction variable so there's no leaking? It would be nice to be able to implement something like that, i'm open to suggestions if you can provide some more intricate examples.
However it would royally fuck over our unit tests :D. This is interesting stuff, we'd really be interesting in implementing something like this p15martincan you show us how you utilize it in your app?
We could even wrap the callback function of the resulting event emitter in a namespace thereby propagating the transaction to that callback, magic. I believe it is scoped to an asynchronous call chain. Hmm, i was hoping your code would show how to cover nested calls. Although in that specific case you have the transaction variable, but i was thinking something more generic using CLS. Apparently there's a major performance implication of using the process.
I corrected my call to findso everything is associated with the transaction. When I call commit I am still loosing my data.The key difference is that the managed transaction uses a callback that expects a promise to be returned to it while the unmanaged transaction returns a promise. Managed transactions handle comitting or rolling back the transaction automagically. You start a managed transaction by passing a callback to sequelize.
Notice how the callback passed to transaction returns a promise chain, and does not explicitly call t. If all promises in the returned chain are resolved successfully the transaction is comitted. If one or several of the promises are rejected, the transaction is rolled back. When using the managed transaction you should never commit or rollback the transaction manually.
If all queries are successful, but you still want to rollback the transaction for example because of a validation failure you should throw an error to break and reject the chain:. To automatically pass the transaction to all queries you must install the continuation local storage CLS module and instantiate a namespace in your own code:. To enable CLS you must tell sequelize which namespace to use by setting it as a property on the sequelize constructor:.
Notice, that the cls property must be set on the constructornot on an instance of sequelize. This means that all instances will share the same namespace, and that CLS is all-or-nothing - you cannot enable it only for some instances.
CLS works like a thread-local storage for callbacks. What this means in practice is, that different callback chains can access local variables by using the CLS namespace. When CLS is enabled sequelize will set the transaction property on the namespace when a new transaction is created. Since variables set within a callback chain are private to that chain several concurrent transactions can exist at the same time:. In most case you won't need to access namespace.
Unmanaged transactions force you to manually rollback or commit the transaction. If you don't do that, the transaction will hang until it times out. To start an unmanaged transaction, call sequelize.
The transaction option goes with most other options, which are usually the first argument of a method. For methods that take values, like. If unsure, refer to the API documentation for the method you are using to be sure of the signature.kb4480966mamono.pw - Updating an Express and Sequelize API to use async/await
Sequelize The Node.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. Read the tutorials to see a full example. More documents please refer to Sequelize.
NOTE: options. Define all your associations in Model. See example below. You can use config. If you define the same model for different datasource, the same model file will be excute twice for different database, so we can use the secound argument to get the sequelize instance:.
By default, egg-sequelize will use sequelize 5, you can cusomize sequelize version by pass sequelize instance with config. Sequelize like this:. We strongly recommend you to use Sequelize - Migrations to create or migrate database. Using sequelize-cli to help manage your database, data structures and seed data. Please read Sequelize - Migrations to learn more infomations.
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Learn more. Asked 3 years, 9 months ago. Active 3 years, 9 months ago. Viewed 4k times. Paid ; res. H 1 1 gold badge 3 3 silver badges 16 16 bronze badges. Active Oldest Votes. You should pass the transaction parameter inside the options object.
Managed transaction (auto-callback)
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