My code to insert values is:
def insert(link: entity.Link) : IO[Int] = {
logger.info("Inserting link: " + link.toString())
sql"insert into links (title,url,publication_date,feed_id) values (${link.getTitle},${link.getUrl},${link.getPublicationDate},${link.getFeed.getId})"
.update
.run
.transact(transactor)
}
The method calling it is:
val links = for{
feeds <- getFeeds()
ls: List[Link] = feeds.flatMap(rssFeedReader.readFeedItems(_).asScala)
ios = ls.map(
link =>
linkPersistence
.countByUrl(link.getUrl())
.map(x => if(x==0) linkPersistence.insert(link) else identity(x))
)
s <- ios.sequence
}yield(s)
val result = links.unsafeRunSync()
logger.info("Result: " + result.toString())
Unfortunately, I cannot use For Expressions, because IO
doesn't have withFilter
and I am inside a Maven project (I am migrating a Spring Boot application to Typelevel stack), so I cannot use the improved For Expressions sbt plugin.
My problem is that rows are not inserted into the database. On the log there is:
reddit_bot_1 | 2021-04-23 13:06:57.805 INFO 1 --- [text-global-167] r.i.repository.LinkPersistence : Inserting link: Link{id=0, feed=Feed{id=79, url='https://ytali.com/feed/'}, title='Se il grillo non fosse stato parlante', url='https://ytali.com/2021/04/21/se-il-grillo-non-fosse-stato-parlante/', publicationDate=Wed Apr 21 11:12:59 GMT 2021}
reddit_bot_1 | 2021-04-23 13:06:57.838 INFO 1 --- [text-global-167] r.i.repository.LinkPersistence : Inserting link: Link{id=0, feed=Feed{id=82, url='https://cronacheletterarie.com/feed/'}, title='Scrivere come in una serie tv', url='https://www.cronacheletterarie.com/2021/04/22/scrivere-come-in-una-serie-tv-due-nuovi-thriller-italiani/', publicationDate=Thu Apr 22 06:50:30 GMT 2021}
reddit_bot_1 | 2021-04-23 13:06:57.993 INFO 1 --- [nio-8080-exec-1] reddit_bot.service.LinkUpdater : Result: List(1, 1, 1, 1, 1, 1, 1, IO$970148716, IO$398844220, IO$2051359159, IO$1102460161, IO$1646104176, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$1525243662, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$183629085, IO$2057291647, IO$1962915922, IO$1686018284, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$1629671523, IO$1703036679, IO$1823891149, IO$2090799695, IO$189359223, IO$2089070694, IO$572184845, IO$638827115, IO$1723402242, IO$1063752499, IO$1262614371, IO$1882901634, IO$1592599455, IO$1561386362, IO$422495060, IO$1071010351, IO$135298961, IO$1395689700, IO$1022084533, IO$824291117, IO$977707631, IO$1835432555, IO$264428575, IO$858145293, IO$1014815708, IO$1654086426, IO$2074886515, IO$2048606753, IO$551801989, IO$2029261832, IO$1640654268, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$1096825326, IO$2132380347, IO$664110340, IO$364966863, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$1429149648, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, IO$1724908444, IO$1835403239, IO$2133511951, IO$1385617069, IO$876405632, IO$1773704159, IO$1078164304, IO$604307019, IO$2004298152, 1, IO$1526495986, 1, 1, 1, 1, 1, 1, 1, 1, 1)
The transactor is created like this:
def transactor() = Transactor.fromDriverManager[IO](
"com.mysql.cj.jdbc.Driver",
"jdbc:mysql://database:3306/redditbot",
"redditbot",
"redditbot"
)
UPDATE
As suggested by @luis-miguel-mejía-suárez I modified my pom.xml
file like this:
<plugin>
<groupId>net.alchim31.maven</groupId>
<artifactId>scala-maven-plugin</artifactId>
<version>4.4.1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
<sourceDir>src/main/scala</sourceDir>
<compilerPlugins>
<compilerPlugin>
<groupId>com.olegpy</groupId>
<artifactId>better-monadic-for_2.13</artifactId>
<version>0.3.1</version>
</compilerPlugin>
</compilerPlugins>
</configuration>
</plugin>
But the problem remains.
As written by @LuisMiguelMejíaSuárez
The workaround that I have found is moving the filter inside another function :
The calling code becomes: