I am using a custom database (MongoDB) with TG 2.1 and i am wondering where the proper place to store the PyMongo connection/database instances would be?
Eg, at the moment they are getting created inside of my inherited instance of AppConfig. Is there a standard location to store this? Would shoving the variables into the project.model.__init__ be the best location, given that under SQLAlchemy, the database seems to commonly be retrieved via:
from project.model import DBSession, metadata
Anyway, just curious what the best practice is.
As of TurboGears 2.1.3, MongoDB support is integrated via the Ming ORM. I would look at a quickstarted project using the --ming option to get best practices if you want to do some customization: http://turbogears.org/2.1/docs/main/Ming.html
Related
I want to implement a multi-tenant solution where I have one webserver and one database shared across all tenants. Regarding to this blog post from AWS it is "pooled multi tenancy model".
I'm using nest.js and sequelize. If sequelize is not a good fit for this I also could switch to another library like typeORM if necessary.
How can this be implemented? I'm absolutely clueless how I can use a different connection (different database user) for each HTTP request and also I don't know how to set a runtime context variable for the connection in a good way.
What I get currently is that every HTTP requests contains a header tenant-id. This should be used for all queries.
There is also the concept of scopes in sequelize. But this is something that is implemented on the client side and not on the database directly. Also, this is something that is specific to sequelize. I would prefer a solution that is independent from sequelize and maybe more specific to PostgreSQL.
Is there any way to implement this with sequelize? A hint or a basic approach would be sufficient.
That seems that this approach is similar. https://learn.microsoft.com/en-us/microsoft-365/education/deploy/design-multi-tenant-architecture.
I'm studding for create a similar architecture, but i will use the "silo" model or "physical database". I think that at first you need to create a internal database called "catalog" that will contains the information of the user (this user already have a login? if true select this information) where have to contains a previous credentials how tenant-id. About the Sequelize, i guess that is necessary to use RAW queries for create ROLE|GRANT|DATA BASE etc and the MIGRATIONS to create the same DB for each new clients.
Hi I am new to Apache Atlas . And I am facing a problem.
I want to create a hive_table entity type manually but in Entity type drop downs its showing only "hdfs_path"
Can anyone let me know how I can use a custom entity type in apache Atlas.
And can anyone provide me a good documentation part or tutorial apart form Apche Atlas site.
Here is the photo where I want to add a new entity type
TL;DR: you need to apply the following setting to atlas-application.properties, and restart:
atlas.ui.editable.entity.types=<your entity types>
Note that <your entity types> can be a comma-separated list, like hdfs_path,kafka_topic or, to just allow all Types to be created and edited via the UI, use a star *.
I guess the reason for this restrictive default is because metadata in Atlas is normally synchronised from other systems using hooks and bridges. So in order to keep the metadata "consistent" (i.e. prevent the risk of people creating metadata entries in Atlas which do not correspond to actual data assets existing in the referenced systems), by default editing Entity Types via the UI is locked down.
Reference: https://issues.apache.org/jira/browse/ATLAS-3237
hive_table entity should be synced using import scripts.
"hdfs_path" is not synced automatically unless they belong to lineage, hence the option to create them manually.
However, if you want to create them manually, please check the following link, which has the steps:-
https://community.cloudera.com/t5/Support-Questions/How-to-create-hive-table-entity-in-Apache-atlas-using-REST/td-p/173644
I am using Telosys tools for code generation. It's very nice tool and help me a lot.
But there is one problem, that is, it provides database schema information and i can access in templates (templates are formerly velocity templates), which is good, but how can i get selected entity's data from database? There is no way i can find, by which i can get that selected table data.
Please provide solution if any, or provide alternate way to do it.
Thanking You!
Telosys Tools is designed to retrieve the model from the database,
not the data stored in the tables.
But it allows to create your own specific tooling classes usable
in the templates, so it's possible to create a specific Java Class to retrieve the data from the database.
There's an example of this kind of specific class in the "database-doc" bundle
https://github.com/telosys-tools/database-doc-bundle-TT210 ( in classes folder )
To simplify the loading the simplest way is to create the class in the "default package" (no java package)
NB:
The problem is that the jar containing the JDBC driver
is not accessible by the generator class-loader, so you will have to use a specific class-loader and to connect directly with the JDBC driver.
Here is an example : https://gist.github.com/l-gu/ed0c8726807e5e8dd83a
Don't use it as is (the connection is never closed) but it can be easily adapted.
Could anyone please tell me how MongoDB can be used with YII?
How can we create controller and model functions using Gii if the database used is MongoDB?
I've used YiiMongoDBSuite (YMDS), which has some very rough support for Gii. You can generate starter classes, but given that MongoDB does not have a fixed schema you will need to edit the model to make them useful. There is an odd kludge that lets you generate MongoDB models from a SQL table, but this seems more effort than it's worth.
YMDS' EMongoDocument class extends the standard Yii CModel class, so this is a useful base if you want to build apps with CRUDS.
The unfortunate caveat is that YMDS is no longer maintained by the original author, and there are a few community forks to chose between.
The way of creating controllers is same as usual but you have to use an extension to talk to mongoDB from Yii ,
You need to use direct Mongo suite of yii . It is an extension which has a collection of components for the mongoDB .
I have come across a requirement that needs to access a set of databases in a Mongodb server, using TurboGear framework. There I need to list down the Databases, and allow the user to select one and move on. As far as I looked, TurboGear does facilitate multiple databases to use, but those needs to be specify beforehand in the development.ini.
Is there a way to just connect to the db server(or to a particular database first) and then get the list of databases and select one on the fly?
For SQLAlchemy you can achieve something like that using a smarter Session.
Just subclass the sqlalchemy.orm.Session class and override the get_bind(self, mapper=None, clause=None) method.
That method is called each time the session has to decide which engine to use and is expected to return the engine itself. You can then store a list of engines wherever you prefer and return the correct one.
When using Ming/MongoDB the same can probably be achieved by subclassing the ming.Session in model/session.py and overridding the ming.Session.db property to return the right database.