Java android ROOM get object with detais
I have this :
@Entity(tableName = "director"/*,
indices = {@Index(value = "full_name", unique = true)}*/)
public class Director {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "did")
public int id;
@ColumnInfo(name = "full_name")
@NonNull
public String fullName;
@Entity(tableName = "movie",
foreignKeys = @ForeignKey(entity = Director.class,
parentColumns = "did",
childColumns = "directorId",
onDelete = ForeignKey.CASCADE),
indices = {@Index("title"), @Index("directorId")})
public class Movie {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "mid")
public int id;
@ColumnInfo(name = "title")
@NonNull
public String title;
@ColumnInfo(name = "directorId")
public int directorId;
Amd when I get all movies I get director id . What I should to do to generate this :
public class MovieWithDirector {
Movie movie;
Director director;
}
I can get a user and later get directerByID but I don not now if this is a the best way to do this
java
android android-room asked Nov 26 '18 at 6:54
jpok2jpok2
228
add a comment |
I have this :
@Entity(tableName = "director"/*,
indices = {@Index(value = "full_name", unique = true)}*/)
public class Director {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "did")
public int id;
@ColumnInfo(name = "full_name")
@NonNull
public String fullName;
@Entity(tableName = "movie",
foreignKeys = @ForeignKey(entity = Director.class,
parentColumns = "did",
childColumns = "directorId",
onDelete = ForeignKey.CASCADE),
indices = {@Index("title"), @Index("directorId")})
public class Movie {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "mid")
public int id;
@ColumnInfo(name = "title")
@NonNull
public String title;
@ColumnInfo(name = "directorId")
public int directorId;
Amd when I get all movies I get director id . What I should to do to generate this :
public class MovieWithDirector {
Movie movie;
Director director;
}
I can get a user and later get directerByID but I don not now if this is a the best way to do this
java
android android-room asked Nov 26 '18 at 6:54
jpok2jpok2
228
add a comment |
I have this :
@Entity(tableName = "director"/*,
indices = {@Index(value = "full_name", unique = true)}*/)
public class Director {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "did")
public int id;
@ColumnInfo(name = "full_name")
@NonNull
public String fullName;
@Entity(tableName = "movie",
foreignKeys = @ForeignKey(entity = Director.class,
parentColumns = "did",
childColumns = "directorId",
onDelete = ForeignKey.CASCADE),
indices = {@Index("title"), @Index("directorId")})
public class Movie {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "mid")
public int id;
@ColumnInfo(name = "title")
@NonNull
public String title;
@ColumnInfo(name = "directorId")
public int directorId;
Amd when I get all movies I get director id . What I should to do to generate this :
public class MovieWithDirector {
Movie movie;
Director director;
}
I can get a user and later get directerByID but I don not now if this is a the best way to do this
java
android android-room asked Nov 26 '18 at 6:54
jpok2jpok2
228
I have this :
@Entity(tableName = "director"/*,
indices = {@Index(value = "full_name", unique = true)}*/)
public class Director {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "did")
public int id;
@ColumnInfo(name = "full_name")
@NonNull
public String fullName;
@Entity(tableName = "movie",
foreignKeys = @ForeignKey(entity = Director.class,
parentColumns = "did",
childColumns = "directorId",
onDelete = ForeignKey.CASCADE),
indices = {@Index("title"), @Index("directorId")})
public class Movie {
@PrimaryKey(autoGenerate = true)
@ColumnInfo(name = "mid")
public int id;
@ColumnInfo(name = "title")
@NonNull
public String title;
@ColumnInfo(name = "directorId")
public int directorId;
Amd when I get all movies I get director id . What I should to do to generate this :
public class MovieWithDirector {
Movie movie;
Director director;
}
I can get a user and later get directerByID but I don not now if this is a the best way to do this
java
android android-room java
android android-room asked Nov 26 '18 at 6:54
jpok2jpok2
228
asked Nov 26 '18 at 6:54
jpok2jpok2
228
asked Nov 26 '18 at 6:54
jpok2jpok2
228
asked Nov 26 '18 at 6:54
jpok2jpok2
228
asked Nov 26 '18 at 6:54
jpok2jpok2
228
228
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
I would say that better way to perform this action is to write query with join:
SELECT movie.title, director.fullname
FROM director
INNER JOIN movie
ON movie.directorId=director.id
WHERE director.id= :passed_value
Of course you will need custom class to for storing query result.
If you check example from this link, and combine with query above then you'll be able to solve your problem.
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
add a comment |
I think you want to use @Relation
https://developer.android.com/reference/android/arch/persistence/room/Relation
answered Nov 30 '18 at 14:01
danieldaniel
706411
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
I would say that better way to perform this action is to write query with join:
SELECT movie.title, director.fullname
FROM director
INNER JOIN movie
ON movie.directorId=director.id
WHERE director.id= :passed_value
Of course you will need custom class to for storing query result.
If you check example from this link, and combine with query above then you'll be able to solve your problem.
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
add a comment |
I would say that better way to perform this action is to write query with join:
SELECT movie.title, director.fullname
FROM director
INNER JOIN movie
ON movie.directorId=director.id
WHERE director.id= :passed_value
Of course you will need custom class to for storing query result.
If you check example from this link, and combine with query above then you'll be able to solve your problem.
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
add a comment |
I would say that better way to perform this action is to write query with join:
SELECT movie.title, director.fullname
FROM director
INNER JOIN movie
ON movie.directorId=director.id
WHERE director.id= :passed_value
Of course you will need custom class to for storing query result.
If you check example from this link, and combine with query above then you'll be able to solve your problem.
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
I would say that better way to perform this action is to write query with join:
SELECT movie.title, director.fullname
FROM director
INNER JOIN movie
ON movie.directorId=director.id
WHERE director.id= :passed_value
Of course you will need custom class to for storing query result.
If you check example from this link, and combine with query above then you'll be able to solve your problem.
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
answered Nov 26 '18 at 14:05
BartoszBartosz
11615
11615
add a comment |
add a comment |
I think you want to use @Relation
https://developer.android.com/reference/android/arch/persistence/room/Relation
answered Nov 30 '18 at 14:01
danieldaniel
706411
add a comment |
I think you want to use @Relation
https://developer.android.com/reference/android/arch/persistence/room/Relation
answered Nov 30 '18 at 14:01
danieldaniel
706411
add a comment |
I think you want to use @Relation
https://developer.android.com/reference/android/arch/persistence/room/Relation
answered Nov 30 '18 at 14:01
danieldaniel
706411
I think you want to use @Relation
https://developer.android.com/reference/android/arch/persistence/room/Relation
answered Nov 30 '18 at 14:01
danieldaniel
706411
answered Nov 30 '18 at 14:01
danieldaniel
706411
answered Nov 30 '18 at 14:01
danieldaniel
706411
answered Nov 30 '18 at 14:01
danieldaniel
706411
706411
add a comment |
add a comment |
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