ng-crud | Angular-based CRUD | DB Client library

I've seen people saying its possible like in here.

But there is no implementation, only definition:

I'm reading the loopback 4 documentation. I also already read typescript tutorials. But I don't get this syntax:

I am new at Angular and trying to build a small crud application using this link

https://overflowjs.com/posts/Angular-8-Understanding-Directory-Structure-and-Creating-CRUD-App.html

I have done exactly as it is mentioned. I am getting an error which I cant seem to understand. The error is below :

I am writing a client that makes requests to the DA Ledger. I am following the advice I received in a previous post Doing CRUD on the DA Ledger through a gRPC client.
I need to run the 'GetTransactions' rpc. Doing so requires GetTransactionsRequest object. The GetTransactionsRequest object has a required property called 'filter' which is of type TransactionFilter. I am having trouble creating a transaction filter to meet my needs. The .proto file for it is:

I am new to spring. And I have encounter an error on my spring application. It says :

I am new to Ionic and Angular, and probably my question is primitive, but it would be helpful, if someone can help me and explain what is wrong!

I was just going through this tutorial, doing all the same and trying to understand the code. All was fine but at the final testing I got an error:

OPTIONS http://localhost:1337/localhost:3000/api/classroom net::ERR_CONNECTION_REFUSED

And looks like another user also got it and posted comment, but it hasn't been solved. Can you help me with this?

BTW another user's error "Property 'location' does not exist on type 'DetailPage'." also exists, but well, this one is not so critical...

Thanks in advance!

I have to do a little bit of "crowdsourcing" for my work and it would consist in a very simple web app where a user can register/log in, and then be taken to a page where a picture is shown to a user and submit a number.

I'd like to be able to set up a few rules to choose which picture the user will see (so he won't have to answer twice the same question and also to allow some overlap between users to compare their answers).

We can assume that I have a google sheet with a list of images URLs that can be accessed and that I would like the answers to be populated there.

I figured that this tutorial would be a good start since it handles user creation and management and user can submit ideas :

Creating a CRUD Web App with Google Sheets

That being said I'm a bit clueless, I've tried to look for sample scripts deployed as web app but it's hard to know where to start.

I'll appreciate any help !

This is the dummy data in my dummy temp table:

Above, there is no data in columna, however that is just by accident. I want to get rows having

• no data in columna
• having columnb value matching input parameter value
• having columnc value be max numeric equivalent for that column. (That is columnc is of type character varying(255), but I know there will be integers in that cell. So I want only those rows which have the maximum integer equivalent value for the column, i.e. 1 in above data)

The query will look something like this:

In Spring Data project the CrudRepository provides sophisticated CRUD functionality for the entity class that is being managed.