Does anyone know how to drop a collection safely in Meteor? There doesn't seem to be an API method for this. The collections are published, so I want to cleanup the associated data and functions (besides just removing the MongoDB collection).
Someone asked a similar question but no one actually answered it (just other concerns apart from dropping the collection).
Clarification: I need to do this from the meteor program at runtime.
You can drop a collection with the basic mongo shell command : db.collection.drop()
To do that, you have to connect to your mongo shell in your command line.
There is another easier way : Robomongo ( http://robomongo.org/ ) which is a really nice GUI to manage mongo db. Once logged on mongo, just right click on your collection and then > drop (and confirm of course).
For example, to log in on your local environment, give any name and skip login. The address should be localhost : 3001.
Related
First, thanks Hasura for incredible good product! I love it.
I have issue with derive action with Hasura Console. My use case:
I enable anonymous role for subscribe function (everybody can send email to subscribe)
I have configured permission on my subscribe table, everything is fine.
I want to validate the user input on server side, for example, validate email format. I have followed by this guide about derive action. I found no mistake here.
But I got the error "Type query_root must define one or more fields." when I hit "Derive action" at the first time.
According to this question, as I understand, I need to have object type for root query.
Of course, I will have object type for root query eventually. I can work around by giving some dummy queries for anonymous role. But I do not like that cheat anyway.
Any idea on that? Any help will be highly appreciated.
Edited:
My related current version:
Hasura 1.3.2
One click deployment using Docker on Digital Ocean.
I have a MongoDB collection Foods in my Meteor app with about 8000 entries with almost 1000 fields each.
For some reason, since I included it, the response time when I call a server method from the client is very slow (seconds). For debugging, I've been removing things one by one. Now, I don't use the collection in any of the functions involved (I've even replaced the server method with just a console.log), and yet if I add the line import { Foods } from '../imports/collections.js'; to the server, the response is slow, and if I don't it is fast.
Does anyone have any idea why this could be?
Note: OP has already answered his question satisfactory. However, the following information should be pointed out, especially for those who face similar issues in context of controlling Meteor's autopublish behavior.
As long as autopublish exists in your packages list, each collection publishes to the client at the very moment, your Mongo.Collection is created.
See this code of the Mongo.Collection constructor.
Autopublish is then triggered, even just by importing your file that contains a Mongo.Collection constructor to be called (which is very likely your case).
However, you dont need to remove the autopublish package if you only want this one collection to prevent auto publishing.
Your Mongo.Collection constructor accepts as second parameter an object with options. To prevent auto publish only for this collection (while having autopublish active) you can add the following option:
{
_preventAutopublish: true,
// ... other options if desired
}
An example for your given Foods collection could be
export const Foods = new Mongo.Collection('foods', {_preventAutopublish: true});
Although the option is not documented, it works and comes in very handy when prototyping.
However, keep in mind that autopublish is not secure and should never be present in a release that is expected to be deployed on a server.
So the answer was easy.
As said in the Meteor docs,
By default, Meteor automatically publishes every document in your collection to each connected client. To turn this behavior off, remove the autopublish package
So, simply by importing the collection, Meteor interprets that you want to publish it all, and that is what was making it slow, even if I wasn't explicitly using it.
I'm referring to SQLite-PCL tutorial here: https://code.tutsplus.com/tutorials/an-introduction-to-xamarinforms-and-sqlite--cms-23020
I'm very new to SQLite, so I'm lacking in knowledge in lots of basic things - I have tried Googling, can't understand most of it.
Is the call to new SQLiteConnection actually opens up the database or just saying that "the road to the database has been established, whether you access it or not is up to you"?
How do I check if there's already existing database in the devices? And if there is, how do I access it? I have Googled this, but it all seems to be a bit extreme - can't I just call simple OPEN the database?
Is it okay to have multiple SQLiteConnection instances to the same database, if I can be sure that I'm not going to do multiple transaction at the same time?
After I have INSERT into the database, close the app, open up the app back - how do I make sure that there is database created in previous session? Any way to debug this? Because I have no idea if the database is there or not, and I don't know how to access it either..
SQLiteConnection returns a connection object that is used to make subsequent queries
use File.Exists to see if the db file is already present
Yes
Again, use File exists to see if the db file is physically present
Xamarin's ToDo sample provides a good overview of using SQLite with Forms.
I am trying to truncate one of our tables in a class to run as a batch job, but keep getting a "Request for permission of type SqlDataDictionaryPermission failed. This is on an AX 4.0 system. I followed MSDN example on acquiring permissions and I am an admin. Here's the code:
//Truncate table
new SqlDataDictionaryPermission(
methodstr(SqlDataDictionary, tableTruncate)).assert();
sqlDict = new SqlDataDictionary();
sqlDict.tableTruncate(tableNum(PMF_INVENTTABLEMODULELOG),false);
CodeAccessPermission::revertAssert();
As I stated, I have admin access to this, so should have the required security key. Though this is displaying the (usr) environment in the class list.
Are you sure it is running server side?
You did not expose your method definition.
I stumbled upon this issue in Ax 2009, while trying to set up a batch that reindexes tables from parameters.
The method doesn't need to be static or have server predicate. The only thing that works is setting the class "RunOn" parameter as "Server".
I know it's and old question with low views, but perhaps some poor soul can be saved.
Could someone please explain how to obtain a list of all existing databases on a PostgreSQL server, to which the user already has access, using Qt? PostgreSQL documentation suggests the following query:
SELECT datname FROM pg_database WHERE datistemplate = false;
What are the correct parameters to the following functions:
QSqlDatabase::setDatabaseName(const QString & name) //"postgres" or "pg_database"?
QSqlDatabase::setUserName(const QString & name) //actual user name?
QSqlDatabase::setPassword(const QString & password) //no password? or user password?
Much appreciated. Thank you in advance.
You appear to have already answered the first part of your question. Connect to the postgres or template1 database and issue the query you've quoted above to get a list of databases. I'm guessing - reading between the lines - that you don't know how to connect to PostgreSQL to send that query, and that's what the second part of your question is about. Right?
If so, the QSqlDatabase accessor functions you've mentioned are used to set connection parameters, so the "correct" values depend on your environment.
If you want to issue the query above - to list databases - then you would probably want to connect to the postgres database as it always exists and isn't generally used for anything specific, it's there just to be connected to. That means you'd call setDatabaseName("postgres");. Passing pg_database to setDatabaseName would be nonsensical, since pg_database is the pg_catalog.pg_database table, it isn't a database you can connect to. pg_database is one of those odd tables that exists in every database, which might be what confused you.
With the other two accessors specify the appropriate username and password for your environment, same as you'd use for psql; there's no possible way I could tell you which ones to use.
Note that if you set a password but one isn't required because authentication is done over unix socket ident, trust, or other non-password scheme the password will be ignored.
If this doesn't cover your question, consider editing it and explaining your problem in more detail. What've you tried? What didn't work how you expected? Error messages? Qt version?