60 lines
1.5 KiB
Dart
60 lines
1.5 KiB
Dart
abstract class RelationshipType {
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static const int HAS_MANY = 0;
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static const int HAS_ONE = 1;
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static const int BELONGS_TO = 2;
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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: 'id',
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String foreignKey,
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String foreignTable,
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bool cascadeOnDelete: false})
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: super(0,
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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 = const HasMany();
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class HasOne extends Relationship {
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const HasOne(
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{String localKey: 'id',
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String foreignKey,
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String foreignTable,
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bool cascadeOnDelete: false})
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: super(1,
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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 = const HasOne();
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class BelongsTo extends Relationship {
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const BelongsTo(
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{String localKey: 'id', String foreignKey, String foreignTable})
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: super(2,
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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 = const BelongsTo();
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