Generic and Inheritance in scala
0
I have a generic class Field[T]. Now, I want to created and child class extends Field[T] with one more parameters. But I got compile error
class Field[T](val name: String, val label: String, val required: Boolean, val dataType: DataType[T])
class FK[T](override val name: String, override val label: String, override val required: Boolean, override val dataType: DataType[T], val ref: Type) extends Field[T]
Maybe I don't really understand Scala inheritance and generic. Please help me correct FK class.
scala inheritance
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
add a comment |
0
I have a generic class Field[T]. Now, I want to created and child class extends Field[T] with one more parameters. But I got compile error
class Field[T](val name: String, val label: String, val required: Boolean, val dataType: DataType[T])
class FK[T](override val name: String, override val label: String, override val required: Boolean, override val dataType: DataType[T], val ref: Type) extends Field[T]
Maybe I don't really understand Scala inheritance and generic. Please help me correct FK class.
scala inheritance
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
2
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invokeFields constructor anywhere.
– Andrey Tyukin
Dec 29 '18 at 5:53
add a comment |
0
0
0
I have a generic class Field[T]. Now, I want to created and child class extends Field[T] with one more parameters. But I got compile error
class Field[T](val name: String, val label: String, val required: Boolean, val dataType: DataType[T])
class FK[T](override val name: String, override val label: String, override val required: Boolean, override val dataType: DataType[T], val ref: Type) extends Field[T]
Maybe I don't really understand Scala inheritance and generic. Please help me correct FK class.
scala inheritance
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
I have a generic class Field[T]. Now, I want to created and child class extends Field[T] with one more parameters. But I got compile error
class Field[T](val name: String, val label: String, val required: Boolean, val dataType: DataType[T])
class FK[T](override val name: String, override val label: String, override val required: Boolean, override val dataType: DataType[T], val ref: Type) extends Field[T]
Maybe I don't really understand Scala inheritance and generic. Please help me correct FK class.
scala inheritance
scala inheritance
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
edited Dec 29 '18 at 5:49
jwvh
26.1k52140
26.1k52140
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
asked Dec 29 '18 at 5:44
khacsinhcskhacsinhcs
203
203
2
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invokeFields constructor anywhere.
– Andrey Tyukin
Dec 29 '18 at 5:53
add a comment |
2
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invokeFields constructor anywhere.
– Andrey Tyukin
Dec 29 '18 at 5:53
2
2
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invoke
Fields constructor anywhere.– Andrey Tyukin
Dec 29 '18 at 5:53
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invoke
Fields constructor anywhere.– Andrey Tyukin
Dec 29 '18 at 5:53
add a comment |
1 Answer
1
active
oldest
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4
You have to be more specific as to what is being inherited.
... extends Field[T](name,label,required,dataType)
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
4
You have to be more specific as to what is being inherited.
... extends Field[T](name,label,required,dataType)
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
add a comment |
4
You have to be more specific as to what is being inherited.
... extends Field[T](name,label,required,dataType)
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
add a comment |
4
4
4
You have to be more specific as to what is being inherited.
... extends Field[T](name,label,required,dataType)
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
You have to be more specific as to what is being inherited.
... extends Field[T](name,label,required,dataType)
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
answered Dec 29 '18 at 5:58
jwvhjwvh
26.1k52140
26.1k52140
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
add a comment |
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
1
1
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
Many thanks. It worked as my expectation
– khacsinhcs
Dec 29 '18 at 7:32
3
3
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
@khacsinhcs Please upvote or accept the answer as a way to say thank you. Your comment is likely to be deleted, comments like this are not expected here.
– Suma
Dec 29 '18 at 8:33
add a comment |
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2
1) Too many undefined symbols, not Minimal, Complete, and Verifiable example 2) You don't invoke
Fields constructor anywhere.– Andrey Tyukin
Dec 29 '18 at 5:53