AI prompts
base on Entity Framework Core plugin to apply naming conventions to table and column names (e.g. snake_case) # Naming Conventions for Entity Framework Core Tables and Columns
[](https://www.nuget.org/packages/EFCore.NamingConventions/)
By default, EF Core will map to tables and columns named exactly after your .NET classes and properties. For example, mapping a typical Customer class to PostgreSQL will result in SQL such as the following:
```sql
CREATE TABLE "Customers" (
"Id" integer NOT NULL GENERATED BY DEFAULT AS IDENTITY,
"FullName" text NULL,
CONSTRAINT "PK_Customers" PRIMARY KEY ("Id")
);
SELECT c."Id", c."FullName"
FROM "Customers" AS c
WHERE c."FullName" = 'John Doe';
```
For PostgreSQL specifically, this forces double-quotes to be added since unquoted identifiers are automatically converted to lower-case - and all those quotes are an eye-sore. But even if we're using another database such as SQL Server, maybe we just hate seeing upper-case letters in our database, and would rather have another naming convention.
Down with same-name identifier tyranny! Simply add a reference to [EFCore.NamingConventions](https://www.nuget.org/packages/EFCore.NamingConventions/) and enable a naming convention in your model's `OnConfiguring` method:
```c#
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
=> optionsBuilder
.UseNpgsql(...)
.UseSnakeCaseNamingConvention();
```
This will automatically make all your table and column names have snake_case naming:
```sql
CREATE TABLE customers (
id integer NOT NULL GENERATED BY DEFAULT AS IDENTITY,
full_name text NULL,
CONSTRAINT "pk_customers" PRIMARY KEY (id)
);
SELECT c.id, c.full_name
FROM customers AS c
WHERE c.full_name = 'John Doe';
```
## Supported naming conventions
* UseSnakeCaseNamingConvention: `FullName` becomes `full_name`
* UseLowerCaseNamingConvention: `FullName` becomes `fullname`
* UseCamelCaseNamingConvention: `FullName` becomes `fullName`
* UseUpperCaseNamingConvention: `FullName` becomes `FULLNAME`
* UseUpperSnakeCaseNamingConvention: `FullName` becomes `FULL_NAME`
Have another naming convention in mind? Open an issue or even submit a PR - it's pretty easy to do!
## Important notes
* If you have an existing database, adding this naming convention will cause a migration to be produced, renaming everything. Be very cautious when doing this (the process currently involves dropping and recreating primary keys).
* This plugin will work with any relational database provider and isn't related to PostgreSQL or Npgsql in any way.
* This is a community-maintained plugin: it isn't an official part of Entity Framework Core and isn't supported by Microsoft in any way.
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