noria | Fast web applications | Database library
kandi X-RAY | noria Summary
kandi X-RAY | noria Summary
Noria is a new streaming data-flow system designed to act as a fast storage backend for read-heavy web applications based on Jon Gjengset's Phd Thesis, as well as this paper from OSDI'18. It acts like a database, but precomputes and caches relational query results so that reads are blazingly fast. Noria automatically keeps cached results up-to-date as the underlying data, stored in persistent base tables, change. Noria uses partially-stateful data-flow to reduce memory overhead, and supports dynamic, runtime data-flow and query change.
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QUESTION
I am getting the following error zeitwerk/loader/helpers.rb:95:in const_get': uninitialized constant Controllers::BasePublicDecorator (NameError)
This is an error in a local production console using rails c -e production but not an issue in development which works perfectly.
In an engine, CcsCms::PublicTheme, I have a decorator I am using to extend the controller of another CcsCms::Core engine and it is this decorator that is causing the error.
...public_theme/app/decorators/decorators/controllers/base_public_decorator.rb
ANSWER
Answered 2022-Apr-02 at 19:30Problem here is that when lazy loading, nobody is referencing a constant called ...::BasePublicDecorator. However, Zeitwerk expects that constant to be defined in that file, and the mismatch is found when eager loading.
The solution is to configure the autoloader to ignore the decorators, because you are handling their loading, and because they do not define constants after their names. This documentation has an example. It needs to be adapted to your engine, but you'll see the idea.
For completeness, let me also explain that in Zeitwerk, eager loading is a recursive const_get, not a recursive require. This is to guarantee that if you access the constant, loading succeeds or fails consistently in both modes (and it is also a tad more efficient). Recursive const_get still issues require calls via Module#autoload, and if you ran one for some file idempotence also applies, but Zeitwerk detects the expected constant is not defined anyway, which is an error condition.
QUESTION
Having some trouble working out the migration from Classic to Zeitwerk.
After enabling zeitwerk and running rails s, everything seems to work. Then after saving a .rb file and refreshing, I'm seeing an "uninitialized constant" error when trying to require a file from the top level /lib.
Something is misconfigured w/ reloading, but I'm scratching my head trying to work out the details. I was under the impression that having a top level /lib folder is fine and using require to load files in that directory is compatible with Zeitwerk, but now I'm not so sure... ideas as to what I'm getting wrong?
Note: I'm not currently setting any specific eager_load_paths or autoload_paths
EDIT: updated with logging output as suggested by @Xavier
...ANSWER
Answered 2022-Mar-05 at 23:00The namespace CustomModule is shared in parts of the project that are reloadable (under app), and also in parts where is not (under lib).
This is fine, it is supported. You only need to deliberately think about load priorities, because if lib defines CustomModule::Foo and Rails believes CustomModule is reloadable, on reload nobody is loading CustomModule::Foo again, and require is idempotent, so CustomModule::Foo won't be found anymore.
The solution is to make sure lib defines the namespace, and Rails autoloaders reopen it. Essentially same as documented here. This can be done by issuing a require in an initializer that loads the namespace from lib, for example.
That way, when the autoloader scans the file system, it knows it is not responsible for managing CustomModule. It will descend. If there are child constants there everything will work as usual, and those constants will be reloaded, but the namespace itself won't.
QUESTION
In addition to what I did here:
Loop Through excel file using Powershell
I want to send a mail with only the files that are transfered, and I got a small problem with that. To do that and foreach file transfered I added the file to a variable $FilenameFR with the script below.
Here is what I tried
...ANSWER
Answered 2021-Sep-02 at 09:29Assuming your variable $F has the filename for each iteration and variable $FR is set to zero before the major loop, you do not want to add the filenames with += to an (up to then) undefined variable.
Instead, capture the filenames as string array and join these later with newlines in the email.
QUESTION
I'm a beginner in Powershell, and I have a code that loop through PDF files get all their names. Then loop in an excel file for a match if true give the name of the site. here is a sample of my PDF Files, Excel File and Code explained, if you need any other explanation please tell me :
I get all Files Name here ...ANSWER
Answered 2021-Aug-06 at 15:41_ is a valid character for variable names, so $SBF is getting set incorrectly on this line:
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Rust is installed and managed by the rustup tool. Rust has a 6-week rapid release process and supports a great number of platforms, so there are many builds of Rust available at any time. Please refer rust-lang.org for more information.
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