play-slick | Slick Plugin for Play | Object-Relational Mapping library
kandi X-RAY | play-slick Summary
kandi X-RAY | play-slick Summary
The Play Slick module makes Slick a first-class citizen of Play. It consists of two features:. Because Slick creates and manages both a connection pool and a thread pool, integrating Slick with Play boils down to ensuring that all resources allocated by Slick are shutdown when a Play application is stopped (or reloaded). The plugin has its own release cycle and therefore is not integrated into either core Play or Slick.
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QUESTION
I am trying Scala with Play framework and coming from 10+ years of Java/Spring experience
Below is the source code I am trying
Routes file
...ANSWER
Answered 2021-Aug-14 at 16:35In the error message "No Json serializer found for type models.Stock.type
", one important thing to notice is the .type
suffix.
It's referring to the object Stock
, not the case class
. That is the error is saying "I don't know how to serialize object Stock
".
This is because you wrote Json.toJson(Stock)
instead of Json.toJson(Stock())
or maybe you meant Json.toJson(stocks)
.
Stock
refers to the object
while Stock()
is Instantiating the case class
.
Also:
- you don't need to specify the
as(...)
if using aJsObject
in the result. - you dont'e need a
Reads
nor aWrites
if you provide aFormat
(the later is providing the 2 former) - use
val
rather thanvar
(immutability is the strength of Scala)
QUESTION
The project is compiling but whenever I am trying to run it, gives the following error:
...ANSWER
Answered 2021-Apr-15 at 08:47Adding the following line to build.sbt, to force a different implementation of the file watcher service, worked for me:
QUESTION
I have two tables:
Shop
class ShopTable(tag: Tag) extends GenericTableShop, UUID {
...
ANSWER
Answered 2021-Apr-14 at 15:34Yes, this solution is work fine
QUESTION
I'm trying to dockerize my scala application using the sbt-native-packager plugin. I've added the proper elements to build.sbt (see below).
...ANSWER
Answered 2021-Apr-02 at 16:17The solution was that the build.sbt was missing the version! The version seems to be used as the docker tag!
I only needed to add the version to the top of the build.sbt and the error went away, like this:
QUESTION
For a scala project, I'm using play-slick
with play-slick-evolutions
both version 5.0.0
and I generate my db classes with slick-codegen
version 3.3.3
.
I have a table with a primary key
column and some columns with default values
. I want to insert one row without mentioning the primary key column nor any columns with default values. Ideally, this action should return the new primary key of the created row.
My problem is that the generated code from slick-codegen
seems to only allow to insert full rows because it uses an own case class for the rows. This is how the generated code looks (without the comments):
ANSWER
Answered 2021-Mar-21 at 11:29After some days of trying several things, I found one solution.
You can map over a query to select only the columns you want to instert and then use the returning
if you want to return the id of the inserted row.
QUESTION
I recently started a new project, based from the scala-play-react-seed.
I have a little experience with Play and have other projects that use play-slick and slick-evolutions - everything works fine and the evolutions are recognised and applied at startup.
In the new project, this isn't happening. My connection to the database is all OK so that's not the issue.
I don't get any errors or warnings about the evolutions, as far as I can see.
I have tried explicitly turning them on in application.conf
.
This is my build.sbt
:
ANSWER
Answered 2020-Aug-20 at 12:04you need to enable the play evolutions config parameter
https://www.playframework.com/documentation/2.8.x/Evolutions
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