When EF Core migrations generates the database, the Data Source value will be the name of the file created for the SQLite database. "WebApiDatabase"), the connection string should be in the format "Data Source= ". Open the appsettings.json file and add the entry "ConnectionStrings" with a child entry for the SQLite connection string (e.g. Run the following command from the project root folder to install the EF Core database provider for SQLite from NuGet: dotnet add package For detailed instructions including a short demo video see VS Code +. You can also start the application in debug mode in VS Code by opening the project root folder in VS Code and pressing F5 or by selecting Debug -> Start Debugging from the top menu, running in debug mode allows you to attach breakpoints to pause execution and step through the application code. You can test the API directly with a tool such as Postman or hook it up with the example Angular or React app available.Start the api by running dotnet run from the command line in the project root folder (where the WebApi.csproj file is located), you should see the message Now listening on:.Download or clone the tutorial project code from.NET 6 CRUD API on your local machine with the default EF Core InMemory database: SQLite extension for Visual Studio Code - adds support to VS Code for browsing and querying SQLite databases.įollow these steps to download and run the.C# extension for Visual Studio Code - adds support to VS Code for developing.If you have a different preferred code editor that's fine too. Visual Studio Code - code editor that runs on Windows, Mac and Linux.To follow the steps in this tutorial you'll need the following: Create SQLite Database with EF Core Migrations.NET 6 CRUD API from a tutorial I posted recently, it uses the EF Core InMemory db provider by default for testing, we'll update it to connect to a SQLite database and run EF Core migrations to auto generate the database and tables from code. NET 6 API to SQLite using Entity Framework Core, and automatically create/update the SQLite database from code using EF Core migrations. This makes the code a whole lot eaiser to understand and to maintain.This post shows goes through the steps to connect a. to store intermediate results and write a sequence of SQL statements instead. Consider using SQLite in memory tables - CREATE TEMP TABLE. It is easy to waste your time writing extremely convoluted and hard to maintain SQL in an effort to perform in-place JSON manipulation. Having now worked with JSON1 in SQLite for a while I have a tip to share with others going down the same road. The WHERE id = bits ensure that we target the right row.If the relevant value does not exsit in the first place we do not want to do a + 1 on a null value so we do an IFNULL TEST.The SELECT json_set part is where we establish the value to be updated.The UPDATE keywords part does the actual updating, but it needs to know what to updatte.Given how complicated this looks a few explanations are in order Will accomplish both of the updates I have described in my original question above. (select json_extract(keywords.locs,'$.**N**') from keywords where id = '1'), ![]() What I have set out to do here is possible but the SQL syntax is rather more convoluted. I could have just deleted this question but given that the SQLite JSON1 extension appears to be relatively poorly understood I felt it would be more useful to provide an answer here for the benefit of others. 1 Answer Sorted by: 4 Use jsonextract () again after jsoneach (jsonextract ()) to extract each x and y and aggregate: SELECT f.id, MIN (jsonextract (value, '.x')) x, MIN (jsonextract (value, '.y')) y FROM features f, jsoneach (jsonextract (f.data, '.A.B.coordinates')) GROUP BY f.id See the demo. I'd be most obliged to anyone who might be able to tell me how/whether this should/can be done. Which gave the error message error near json_set. ![]() I tried something along the lines of UPDATE keywords json_set(locs,'$.2','2') WHERE kwd = 'stackoverflow' It is not clear to me that this can in fact be done. A sample entry in this database table would be like the one shown below id:1,lang:1,kwd:'stackoverflow',locs:'' I am using this table to store keyword searches and recording the locations from which the search was ininitated in the object locs. However, I have not been able to figure out how I can update or insert individual JSON attribute values. The SQLite JSON1 extension has some really neat capabilities.
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