Is there way to select every field from table using `select` instead of `selectAll`?
I have very wide table and writing every field by hand is time consuming.
selectAll does the job, but I also need to populate some relations and build json_aggs. Is there way to either select every column from table (and then build jsonObject) or extend selectAll with some extra fields?
```
db
.selectFrom('document')
.select((eb)=> [...Solution:...
.selectAll('document')
.select(eb => ...)
.selectAll('document')
.select(eb => ...)
select / groupBy combined helper
I realize this usecase looks awful, but our API takes an input of a list of fields to group by, which also means it will return those fields in the result. What I have works, but there's a lot of duplication:
```javascript
.$if(isGroupedBy(STOP_ID), (qb) =>
qb.select('stopid as stopId').groupBy('stopid'),...
Solution:
But here's how you'd do it if you really really want to https://kyse.link/4PswR
How to delete and insert in one query
Hey! I wonder how with kysely make for example delete and insert in one query to reduce db roundtrips.
```
db.deleteFrom('a')
.where('smthId', '=', a.id)...
Solution:
.filterWhere inference
I have this in a select
```fn
.coalesce(
fn
.jsonAgg(...
Solution:
You can use
.$narrowType for this.json object relation null problem
I am trying to make https://kysely.dev/docs/recipes/relations this helper work, but get error
```
Argument of type 'ExpressionWrapper<DB & { pozycja: DokumentPozycja; } & { rozbicie: DokumentPozycjaRozbicie; }, "dokument" | "pozycja" | "rozbicie", number | null>' is not assignable to parameter of type 'Expression<number>'.
Types of property 'expressionType' are incompatible.
Type 'number | null | undefined' is not assignable to type 'number | undefined'....
Solution:
Never use
undefined or ? in your type interfaces.How to narrow type from jsonArrayFrom
Hey! I need to narrow some types from table that works as
Single Table Inheritance table. I believe this is possible, but after some fighting with api and syntax I am not sure how to make it.
Here is my query:
(sorry for polish, Ubiquitous Language with domain masters)
```...Solution:
oh okey got it,
.$narrowType<PrzyjecieZewnetrznePozycjaRozbicieSelect>() has to be straight after jsonArrayFrom not at the top levelHow to narrow type in select
Is it possible to narrow type from enum
company, person to just person in select query?
```
const results = await db
.selectFrom('receiver')
.where('type', '=', 'person')...Solution:
See
$narrowTypeSubquery from a function
I want to reuse a sub-query that refers to one of the fields in the root query's result.
I tried doing this: ```ts
function queryIsFriendOf<DB extends DatabaseSchema, TB extends keyof DB>(
eb: ExpressionBuilder<DB, TB>,...
Solution:
Don't pass in the expression builder. Its type easily becomes incompatible in other contexts.
Don't use an explicit result type. The result type here is NOT
boolean. It's { is_friend: boolean }. Yes, you can use that as a scalar in SQL and Kysely does handle that correctly. But don't explicitly set the wrong type.
You always need to provide a name for selections using the as method. The name is dialect-specific if you leave it out. Since kysely types don't know which dialect you're using, providing a name for that column automatically is impossible....why is WhereNode.where any operation node?
Hi. I'm working on a different query adapter (non-SQL), so I just want to ask why a WhereNode.where is simply any OperationNode and not a union of some operators (say boolean)
Solution:
It can be so many things that listing them as a union makes no sense.
are nested joins supported?
Like this one: ...
knex .select('*') .from('users') .join('accounts', function () { this.on(function () { this.on('accounts.id', '=', 'users.account_id'); this.orOn('accounts.owner_id', '=', 'users.id'); }); });
knex .select('*') .from('users') .join('accounts', function () { this.on(function () { this.on('accounts.id', '=', 'users.account_id'); this.orOn('accounts.owner_id', '=', 'users.id'); }); });
New dialect for snowflake - quotes and case sensitivity
Snowflake has different behavior compared to Postgres and other dialects currently in Kysely, I want to be able to control the casing of all identifiers / tables / schemas
meaning that if I have
query.selectFrom("table").select(["id"])
I want it to compile to the exact case as it is specified, and also to be able to control if with a configuration to the query compiler (this I imagine is just a simple amendment to the constructor)
...
Help with implementation of new dialect for snowflake
Hello,
I am trying to create a new dialect for snowflake, I am focusing on the query compiling part.
As I have read I saw that the snowflake dialect is supports standard SQL, however I don't know what does that mean when it comes to the
DefaultQueryCompiler
There are several things that snowflake does not support, such as indices....Solution:
Hey ๐
We avoid throwing in such situations in the core, as a design decision. Kysely always outputs something - "Bring Your Own SQL Knowledge".
You can choose to throw in your compiler. It's perfectly fine!...
is there any helper to put all columns in json_build_object?
to avoid manuaล typing all the columns?
Solution:
Nope.
Advice for debugging timeout/connection issues with Kysely
Hi everyone,
We've been using Kysely with pg in prod in our startup for over a year now and everything has been mostly stable, however, we started encountering these random errors with no seemingly obvious reason.
I am 99.9% sure that this is not a Kysely specific issue, but I'd be grateful if someone could advice us on how to debug these issues, as we don't have much experience in this. Googling revealed some stack overflow threads were timeout configs were discussed, but that didn't help us too much....
Is it possible to change type of returned value with jsonBuildObject?
I struggle typing reponse schema in fastify cuz query returns
'wartosc' as string but actually it returns number. Can't simply change zod reponse schema, cuz kysely types wartosc in query is as string, and there is type mismatch anyway. (sorry for polish, ubiquitous language with polish domain masters)
```
jsonBuildObject({
id: eb.ref('domyslnaStawkaVatSprzedazy.id'),
nazwa: eb.ref('domyslnaStawkaVatSprzedazy.nazwa'),...Create conditional cte insert query
Hello
Is it possible to create a condition insert query with conditional cte like this :
` let query = db.with('new_group', (db) =>...
Is it possible to configure to which types database columns are introspected?
We use kysely-codegen and we would like to use those generated types, but they ofter are translated to diffrent types we want. Lets say
int id is introspected to Generated<number> (we would like number type) or decimals are introspected to Numeric (we would like just number)Solution:
kysely-codegen is not developed by us. It's an independent project.
How to infer an aggregated column with `filterWhere` clause as nullable?
Greetings.
I am joining from another table using
leftJoin, then grouping rows by id, and finally using jsonAgg(jsonBuildObject(...)) with a filterWhere method chained on top of this expression as seen in the demo.
The problem is that the inferred type by kysely is incorrect, because it thinks the json aggregate function will always be an array, however, if there are no matching rows from the other table it will be NULL because of the filter where clause....Solution:
Hey ๐
This is a bug.
I'm not sure there's an easy/performant way of solving this....
defineConfig using --environment type issue with seedFolder
Am I misunderstanding how to use this? I couldn't find docs but saw in recent commit it updated description to point to reference: https://github.com/unjs/c12#environment-specific-configuration
Error: "Type 'string' is not assignable to type 'undefined'.ts(2322)"...
Solution:
This should be fine now @ 0.8.9
Accessing underlying methods on the client
Hi. I'm using libsql and I want to batch statements to be sent to the database. The underlying clients have these methods implemented, so I was wondering if it were possible to access these underlying methods from the
Kysely class itself, or if it is necessary for me to write my own extension of the class to achieve this