sequel | A cross-platform IDE for databases | Database library
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A cross-platform IDE for databases.
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Trending Discussions on sequel
QUESTION
I'm trying to docerize my NodeJS API together with a MySQL image. Before the initial run, I want to run Sequelize migrations and seeds to have the tables up and ready to be served.
Here's my docker-compose.yaml
:
ANSWER
Answered 2021-Jun-15 at 15:38I solved my issue by using Docker Compose Wait. Essentially, it adds a wait loop that samples the DB container, and only when it's up, runs migrations and seeds the DB.
My next problem was: those seeds ran every time the container was run - I solved that by instead running a script that runs the seeds, and touch
s a semaphore file. If the file exists already, it skips the seeds.
QUESTION
I'm struggling to get the Pact Broker running in a docker container to connect to my local installation of PostgreSQL on Windows.
This is what my docker run command looks like...
...ANSWER
Answered 2021-Jun-13 at 10:42I think what's happening here is that you've put the container name before the environment argument list to the docker run
command.
So instead of setting the PACT_BROKER_DATABASE_NAME
and other environment variables for the running container with your custom values, they are simply being discarded by the runtime.
Try this instead:
QUESTION
I am using sequelize with express typescript.
I was use sequelize-cli to generate User model. When I tried to get User from model.
I get an error: Property 'User' does not exist on type 'typeof db'
How can I access to User model inside my database model.
Thank you for your help.
This is my code.
model/index.js
...ANSWER
Answered 2021-Jun-13 at 03:51You can use any
to fix this error:
QUESTION
I'd like to give a shot to using Scrapy contracts, as an alternative to full-fledged test suites.
The following is a detailed description of the steps to duplicate.
In a tmp
directory
ANSWER
Answered 2021-Jun-12 at 00:19With @url http://www.amazon.com/s?field-keywords=selfish+gene
I get also error 503
.
Probably it is very old example - it uses http
but modern pages use https
- and amazone
could rebuild page and now it has better system to detect spamers/hackers/bots and block them.
If I use @url http://toscrape.com/
then I don't get error 503
but I still get other error FAILED
because it needs some code in parse()
@scrapes Title Author Year Price
means it has to return item with keys Title Author Year Price
QUESTION
I wanted to create new record if the the record with specified column name does not match or exist else update it.
I have a Model named AssignedDownloadRoute
and defined it like this
ANSWER
Answered 2021-Jun-11 at 20:19It appears that only one field in your model would qualify as unique (assigned_download_route_id
) since it is defined as the primary key. Since that value is not included in your payload, there is nothing unique about each payload. If you would like route_code
to be a unique value, you must define it accordingly in your model with the unique: true
option.
QUESTION
My program grabs ~70 pages of 1000 items from an API and bulk-inserts it into a SQLite database using Sequelize. After looping through a few times, the memory usage of node goes up to around 1.2GB and and then eventually crashes the program with this error: FATAL ERROR: MarkCompactCollector: young object promotion failed Allocation failed - JavaScript heap out of memory
. I've tried using delete
for all of the big variables that I use for the response of the API call and stuff with variable = undefined
and then global.gc()
, however I still get huge amounts of memory usage and eventually it crashes. Would increasing the memory cap of Node.js help? Or would the memory usage of it just keep increasing until it hits the next cap?
Here's the full output of the error:
...ANSWER
Answered 2021-Jun-10 at 10:01From the data you've provided, it's impossible to tell why you're running out of memory.
Maybe the working set (i.e. the amount of stuff that you need to keep around at the same time) just happens to be larger than your current heap limit; in that case increasing the limit would help. It's easy to find out by trying it, e.g. with --max-old-space-size=8000
(megabytes).
Maybe there's a memory leak somewhere, either in your own code, or in one of your third-party modules. In other words, maybe you're accidentally keeping objects reachable that you don't really need any more.
If you provide a repro case, then people can investigate and tell you more.
Side notes:
- according to your output, heap memory consumption is growing to ~4 GB; not sure why you think it tops out at 1.2 GB.
- it is never necessary to invoke
global.gc()
manually; the garbage collector will kick in automatically when memory pressure is high. That said, if something is keeping old objects reachable, then the garbage collector can't do anything.
QUESTION
I have a Postgres database using Sequelize (node/express) as ORM. I have a table called students, in it there are columns: id and name.
In this students table, I have several registered students, but a detail: the last registered ID is 34550 and the first is 30000, they come from an import from a previous database, I need to continue counting from 34550, or that is, from the last registered student. However, when I register a student via API, the generated ID is below 30000. I know that in mysql the ID field being AUTO INCREMENT would solve it, however, as I understand it, postgres works in a different way.
How could I solve this problem?
The migration used to create the table is as follows:
...ANSWER
Answered 2021-Jun-10 at 17:32Based on Frank comment, I was able to adjust using:
QUESTION
Installed Docker, downloaded the mysql image, using VS Code. This is my docker.compose.yml file:
...ANSWER
Answered 2021-Jun-10 at 15:10This error line
Error: listen EADDRINUSE: address already in use :::3000
and the localhost:3000 response
,
suggest that the server.js is up and running at PORT:3000.
npm start is the same as running node server.js ( i don't see it at package.json at scripts but i guess it's there).
So... try one or the other. It's like trying to access the same port with 2 different scripts.
I hope i get it right.
Actually, why you declare in 2 places new Sequelize(...) instance. Also why your config has sqlite and not mysql2? Maybe i misunderstand
QUESTION
I am using Sequelize and MySQL for database.
There are 2 tables session
and question_answer
which are N-to-M relationship, so I created a junction table session_question_answer
to connect them.
error occurs:
...ANSWER
Answered 2021-Jun-09 at 08:42I use the following for a user
/ roles
association for user management. You can change the model names and properties to suit your needs. For details about model associations, check out this section of the sequelize documentation
user.js
QUESTION
First of all, I can't find any answers here and Google. I may search the wrong direction and appreciate any help.
...ANSWER
Answered 2021-Jun-08 at 22:15Check your database username and password. If it's working before then it should work now and I don't think it's related to node of any of your dependancies.
If it's never working, then try to change your password and try again. From your example the config is used by the mysql lib so there's no reason it picks your username and password but explicitly ignores your host.
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