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7 lines
4.6 KiB
7 lines
4.6 KiB
{ |
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"version": 3, |
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"sources": ["../src/model-manager.js"], |
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"sourcesContent": ["'use strict';\n\nconst Toposort = require('toposort-class');\nconst _ = require('lodash');\n\nclass ModelManager {\n constructor(sequelize) {\n this.models = [];\n this.sequelize = sequelize;\n }\n\n addModel(model) {\n this.models.push(model);\n this.sequelize.models[model.name] = model;\n\n return model;\n }\n\n removeModel(modelToRemove) {\n this.models = this.models.filter(model => model.name !== modelToRemove.name);\n\n delete this.sequelize.models[modelToRemove.name];\n }\n\n getModel(against, options) {\n options = _.defaults(options || {}, {\n attribute: 'name'\n });\n\n return this.models.find(model => model[options.attribute] === against);\n }\n\n get all() {\n return this.models;\n }\n\n /**\n * Returns an array that lists every model, sorted in order\n * of foreign key references: The first model is a model that is depended upon,\n * the last model is a model that is not depended upon.\n *\n * If there is a cyclic dependency, this returns null.\n */\n getModelsTopoSortedByForeignKey() {\n const models = new Map();\n const sorter = new Toposort();\n\n for (const model of this.models) {\n let deps = [];\n let tableName = model.getTableName();\n\n if (_.isObject(tableName)) {\n tableName = `${tableName.schema}.${tableName.tableName}`;\n }\n\n models.set(tableName, model);\n\n for (const attrName in model.rawAttributes) {\n if (Object.prototype.hasOwnProperty.call(model.rawAttributes, attrName)) {\n const attribute = model.rawAttributes[attrName];\n\n if (attribute.references) {\n let dep = attribute.references.model;\n\n if (_.isObject(dep)) {\n dep = `${dep.schema}.${dep.tableName}`;\n }\n\n deps.push(dep);\n }\n }\n }\n\n deps = deps.filter(dep => tableName !== dep);\n\n sorter.add(tableName, deps);\n }\n\n let sorted;\n try {\n sorted = sorter.sort();\n } catch (e) {\n if (!e.message.startsWith('Cyclic dependency found.')) {\n throw e;\n }\n\n return null;\n }\n\n return sorted\n .map(modelName => {\n return models.get(modelName);\n })\n .filter(Boolean);\n }\n\n /**\n * Iterate over Models in an order suitable for e.g. creating tables.\n * Will take foreign key constraints into account so that dependencies are visited before dependents.\n *\n * @param {Function} iterator method to execute on each model\n * @param {object} options\n * @private\n *\n * @deprecated\n */\n forEachModel(iterator, options) {\n const sortedModels = this.getModelsTopoSortedByForeignKey();\n if (sortedModels == null) {\n throw new Error('Cyclic dependency found.');\n }\n\n options = _.defaults(options || {}, {\n reverse: true\n });\n\n if (options.reverse) {\n sortedModels.reverse();\n }\n\n for (const model of sortedModels) {\n iterator(model);\n }\n }\n}\n\nmodule.exports = ModelManager;\nmodule.exports.ModelManager = ModelManager;\nmodule.exports.default = ModelManager;\n"], |
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