62 lines
2.1 KiB
JavaScript
62 lines
2.1 KiB
JavaScript
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'use strict';
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function checkNamingCollision(association) {
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if (Object.prototype.hasOwnProperty.call(association.source.rawAttributes, association.as)) {
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throw new Error(
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`Naming collision between attribute '${association.as}'` +
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` and association '${association.as}' on model ${association.source.name}` +
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'. To remedy this, change either foreignKey or as in your association definition'
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);
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}
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}
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exports.checkNamingCollision = checkNamingCollision;
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function addForeignKeyConstraints(newAttribute, source, target, options, key) {
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// FK constraints are opt-in: users must either set `foreignKeyConstraints`
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// on the association, or request an `onDelete` or `onUpdate` behavior
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if (options.foreignKeyConstraint || options.onDelete || options.onUpdate) {
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// Find primary keys: composite keys not supported with this approach
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const primaryKeys = Object.keys(source.primaryKeys)
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.map(primaryKeyAttribute => source.rawAttributes[primaryKeyAttribute].field || primaryKeyAttribute);
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if (primaryKeys.length === 1 || !primaryKeys.includes(key)) {
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newAttribute.references = {
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model: source.getTableName(),
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key: key || primaryKeys[0]
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};
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newAttribute.onDelete = options.onDelete;
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newAttribute.onUpdate = options.onUpdate;
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}
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}
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}
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exports.addForeignKeyConstraints = addForeignKeyConstraints;
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/**
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* Mixin (inject) association methods to model prototype
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*
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* @private
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*
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* @param {object} association instance
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* @param {object} obj Model prototype
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* @param {Array} methods Method names to inject
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* @param {object} aliases Mapping between model and association method names
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*
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*/
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function mixinMethods(association, obj, methods, aliases) {
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aliases = aliases || {};
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for (const method of methods) {
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// don't override custom methods
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if (!Object.prototype.hasOwnProperty.call(obj, association.accessors[method])) {
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const realMethod = aliases[method] || method;
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obj[association.accessors[method]] = function() {
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return association[realMethod](this, ...Array.from(arguments));
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};
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}
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}
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}
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exports.mixinMethods = mixinMethods;
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