How create a constraint with Hibernate?












0















How can I create a constraint with Hibernate? I'm mapping two classes, "Team" and "Match", but I want that a match JUST can happens if the teams are from the same League. The way that I'm doing right now I can create a match with teams from differents leagues (which isn't interesting in this case).
Is there some annotation that "wraps" my teams, home and away, just being from one league? Or I have to do this in my system?



Thanks.



@Table(name = "match")

@Entity

public class Match implements Serializable {



private static final long serialVersionUID = 1L;

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@ManyToOne

@JoinColumn(name = "id_home", referencedColumnName="id")

private Team home;

@ManyToOne

@JoinColumn(name = "id_away", referencedColumnName="id")

private Team away;

@Column

private Integer goalsHome;

@Column

private Integer goalsAway;

@Temporal(value = TemporalType.DATE)

private Date matchDate;


and 



@Table(name="team")

@Entity

public class Team implements Serializable {



private static final long serialVersionUID = 1L;



@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@Column(length = 55)

private String name;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@OneToMany

private List<Match> match;





java hibernate







share|improve this question

























  • do you mean like a JOIN ?

    – Scary Wombat
    Nov 20 '18 at 1:02











  • @TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

    – Hawk
    Nov 20 '18 at 1:08











  • @ScaryWombat but join isn't used only for consults?

    – Hawk
    Nov 20 '18 at 1:08











  • Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

    – Scary Wombat
    Nov 20 '18 at 1:11













  • Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

    – Tim Biegeleisen
    Nov 20 '18 at 1:12
















0















How can I create a constraint with Hibernate? I'm mapping two classes, "Team" and "Match", but I want that a match JUST can happens if the teams are from the same League. The way that I'm doing right now I can create a match with teams from differents leagues (which isn't interesting in this case).
Is there some annotation that "wraps" my teams, home and away, just being from one league? Or I have to do this in my system?



Thanks.



@Table(name = "match")

@Entity

public class Match implements Serializable {



private static final long serialVersionUID = 1L;

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@ManyToOne

@JoinColumn(name = "id_home", referencedColumnName="id")

private Team home;

@ManyToOne

@JoinColumn(name = "id_away", referencedColumnName="id")

private Team away;

@Column

private Integer goalsHome;

@Column

private Integer goalsAway;

@Temporal(value = TemporalType.DATE)

private Date matchDate;


and 



@Table(name="team")

@Entity

public class Team implements Serializable {



private static final long serialVersionUID = 1L;



@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@Column(length = 55)

private String name;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@OneToMany

private List<Match> match;





java hibernate







share|improve this question

























  • do you mean like a JOIN ?

    – Scary Wombat
    Nov 20 '18 at 1:02











  • @TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

    – Hawk
    Nov 20 '18 at 1:08











  • @ScaryWombat but join isn't used only for consults?

    – Hawk
    Nov 20 '18 at 1:08











  • Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

    – Scary Wombat
    Nov 20 '18 at 1:11













  • Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

    – Tim Biegeleisen
    Nov 20 '18 at 1:12














0












0








0








How can I create a constraint with Hibernate? I'm mapping two classes, "Team" and "Match", but I want that a match JUST can happens if the teams are from the same League. The way that I'm doing right now I can create a match with teams from differents leagues (which isn't interesting in this case).
Is there some annotation that "wraps" my teams, home and away, just being from one league? Or I have to do this in my system?



Thanks.



@Table(name = "match")

@Entity

public class Match implements Serializable {



private static final long serialVersionUID = 1L;

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@ManyToOne

@JoinColumn(name = "id_home", referencedColumnName="id")

private Team home;

@ManyToOne

@JoinColumn(name = "id_away", referencedColumnName="id")

private Team away;

@Column

private Integer goalsHome;

@Column

private Integer goalsAway;

@Temporal(value = TemporalType.DATE)

private Date matchDate;


and 



@Table(name="team")

@Entity

public class Team implements Serializable {



private static final long serialVersionUID = 1L;



@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@Column(length = 55)

private String name;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@OneToMany

private List<Match> match;





java hibernate







share|improve this question
















How can I create a constraint with Hibernate? I'm mapping two classes, "Team" and "Match", but I want that a match JUST can happens if the teams are from the same League. The way that I'm doing right now I can create a match with teams from differents leagues (which isn't interesting in this case).
Is there some annotation that "wraps" my teams, home and away, just being from one league? Or I have to do this in my system?



Thanks.



@Table(name = "match")

@Entity

public class Match implements Serializable {



private static final long serialVersionUID = 1L;

@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@ManyToOne

@JoinColumn(name = "id_home", referencedColumnName="id")

private Team home;

@ManyToOne

@JoinColumn(name = "id_away", referencedColumnName="id")

private Team away;

@Column

private Integer goalsHome;

@Column

private Integer goalsAway;

@Temporal(value = TemporalType.DATE)

private Date matchDate;


and 



@Table(name="team")

@Entity

public class Team implements Serializable {



private static final long serialVersionUID = 1L;



@Id

@GeneratedValue(strategy = GenerationType.AUTO)

private Integer id;

@Column(length = 55)

private String name;

@ManyToOne

@JoinColumn(name = "id_league")

private League league;

@OneToMany

private List<Match> match;





java hibernate




java hibernate






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 20 '18 at 1:07







Hawk

















asked Nov 20 '18 at 1:01









HawkHawk

85




85













  • do you mean like a JOIN ?

    – Scary Wombat
    Nov 20 '18 at 1:02











  • @TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

    – Hawk
    Nov 20 '18 at 1:08











  • @ScaryWombat but join isn't used only for consults?

    – Hawk
    Nov 20 '18 at 1:08











  • Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

    – Scary Wombat
    Nov 20 '18 at 1:11













  • Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

    – Tim Biegeleisen
    Nov 20 '18 at 1:12



















  • do you mean like a JOIN ?

    – Scary Wombat
    Nov 20 '18 at 1:02











  • @TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

    – Hawk
    Nov 20 '18 at 1:08











  • @ScaryWombat but join isn't used only for consults?

    – Hawk
    Nov 20 '18 at 1:08











  • Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

    – Scary Wombat
    Nov 20 '18 at 1:11













  • Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

    – Tim Biegeleisen
    Nov 20 '18 at 1:12

















do you mean like a JOIN ?

– Scary Wombat
Nov 20 '18 at 1:02





do you mean like a JOIN ?

– Scary Wombat
Nov 20 '18 at 1:02













@TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

– Hawk
Nov 20 '18 at 1:08





@TimBiegeleisen Actually, I translated my classes wrong. Now it's correct, thanks.

– Hawk
Nov 20 '18 at 1:08













@ScaryWombat but join isn't used only for consults?

– Hawk
Nov 20 '18 at 1:08





@ScaryWombat but join isn't used only for consults?

– Hawk
Nov 20 '18 at 1:08













Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

– Scary Wombat
Nov 20 '18 at 1:11







Sorry I have no idea what you are meaning. Can you show what you want by making SQL?

– Scary Wombat
Nov 20 '18 at 1:11















Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

– Tim Biegeleisen
Nov 20 '18 at 1:12





Is a league associated with a team, or with a match? I think it should only be associated with a team, so remove League from your Match entity.

– Tim Biegeleisen
Nov 20 '18 at 1:12












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