Can't add a new batch because columns: don't have default values. DB defaults don't support in batch inserts

Hello,

when I try to insert something in a many to many table with an extra column, it just throws the exception above. I am using MySQL.

My tables look like this:

object ManyToManys : UUIDTable("many_to_manys") {
    val table1 = reference("table1", Tables1)
    val table2 = reference("table2", Tables2)
    val position = integer("position")

    override val primaryKey = PrimaryKey(table1, position)
}

class ManyToMany(id: EntityID<UUID>) : UUIDEntity(id) {
    companion object : EntityClass<UUID, ManyToMany>(ManyToManys)

    var table1 by Table1 referencedOn ManyToManys.table1
    var table2 by Table2 referencedOn ManyToManys.table2
    var position by ManyToManys.position
}

(I am using this disgusting UUID hack since Exposed does not support many to many tables with extra columns)

when I try to insert via

ManyToMany.new {
    this.table1 = myTable1
    this.table2 = myTable2
    this.position = myPos
}

it crashes with org.jetbrains.exposed.sql.statements.BatchDataInconsistentException: Can't add a new batch because columns: many_to_manys.`position` don't have default values. DB defaults don't support in batch inserts eventhough I have supplied a position.

[maffelbaffel]

Had the same Problem because a column was not specified as nullable e.g. description

object Projects : UUIDTable() {
    val title = varchar("title", 32)
    val description = varchar("description", 255)
}
class Project(id: EntityID<UUID>) : UUIDEntity(id) {
    companion object : UUIDEntityClass<Project>(Projects)

    var title by Projects.title
    var description by Projects.description
}

Added a project using Project.new in my service without setting a value for description:

transaction {
        Project.new {
            title = model.title
        }
}

Changed description to nullable with val description = varchar("description", 255).nullable(). That resolved my problem.

[Tapac]

@gringofe , @stalexxx , please share a reproducible sample project on GitHub and I’ll debug it.