76 lines
2 KiB
Dart
76 lines
2 KiB
Dart
abstract class RelationshipType {
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static const int hasMany = 0;
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static const int hasOne = 1;
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static const int belongsTo = 2;
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static const int manyToMany = 3;
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}
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class Relationship {
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final int type;
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final String localKey;
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final String foreignKey;
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final String foreignTable;
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final bool cascadeOnDelete;
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const Relationship(this.type,
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{this.localKey,
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this.foreignKey,
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this.foreignTable,
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this.cascadeOnDelete});
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}
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class HasMany extends Relationship {
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const HasMany(
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{String localKey,
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String foreignKey,
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String foreignTable,
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bool cascadeOnDelete = false})
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: super(RelationshipType.hasMany,
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localKey: localKey,
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foreignKey: foreignKey,
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foreignTable: foreignTable,
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cascadeOnDelete: cascadeOnDelete == true);
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}
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const HasMany hasMany = HasMany();
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class HasOne extends Relationship {
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const HasOne(
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{String localKey,
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String foreignKey,
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String foreignTable,
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bool cascadeOnDelete = false})
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: super(RelationshipType.hasOne,
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localKey: localKey,
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foreignKey: foreignKey,
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foreignTable: foreignTable,
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cascadeOnDelete: cascadeOnDelete == true);
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}
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const HasOne hasOne = HasOne();
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class BelongsTo extends Relationship {
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const BelongsTo({String localKey, String foreignKey, String foreignTable})
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: super(RelationshipType.belongsTo,
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localKey: localKey,
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foreignKey: foreignKey,
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foreignTable: foreignTable);
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}
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const BelongsTo belongsTo = BelongsTo();
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class ManyToMany extends Relationship {
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final Type through;
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const ManyToMany(this.through,
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{String localKey,
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String foreignKey,
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String foreignTable,
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bool cascadeOnDelete = false})
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: super(
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RelationshipType.hasMany, // Many-to-Many is actually just a hasMany
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localKey: localKey,
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foreignKey: foreignKey,
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foreignTable: foreignTable,
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cascadeOnDelete: cascadeOnDelete == true);
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}
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