objection
Version:
An SQL-friendly ORM for Node.js
445 lines (335 loc) • 33.8 kB
JavaScript
'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = undefined;
var _create = require('babel-runtime/core-js/object/create');
var _create2 = _interopRequireDefault(_create);
var _keys = require('babel-runtime/core-js/object/keys');
var _keys2 = _interopRequireDefault(_keys);
var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');
var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
var _createClass2 = require('babel-runtime/helpers/createClass');
var _createClass3 = _interopRequireDefault(_createClass2);
var _lodash = require('lodash');
var _lodash2 = _interopRequireDefault(_lodash);
var _relationExpressionParser = require('./parsers/relationExpressionParser');
var _relationExpressionParser2 = _interopRequireDefault(_relationExpressionParser);
var _ValidationError = require('../model/ValidationError');
var _ValidationError2 = _interopRequireDefault(_ValidationError);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var RECURSIVE_REGEX = /^\^(\d*)$/;
var ALL_RECURSIVE_REGEX = /^\*$/;
var RelationExpression = function () {
function RelationExpression(node, recursionDepth, filters) {
(0, _classCallCheck3.default)(this, RelationExpression);
node = node || {};
this.name = node.name || null;
this.args = node.args || [];
this.numChildren = node.numChildren || 0;
this.children = node.children || {};
Object.defineProperty(this, '_recursionDepth', {
enumerable: false,
value: recursionDepth || 0
});
Object.defineProperty(this, '_filters', {
enumerable: false,
writable: true,
value: filters || {}
});
}
/**
* @param {string|RelationExpression} expr
* @returns {RelationExpression}
*/
RelationExpression.parse = function parse(expr) {
if (expr instanceof RelationExpression) {
return expr;
} else if (!_lodash2.default.isString(expr) || _lodash2.default.isEmpty(expr.trim())) {
return new RelationExpression();
} else {
try {
return new RelationExpression(_relationExpressionParser2.default.parse(expr));
} catch (err) {
throw new _ValidationError2.default({
message: 'Invalid relation expression "' + expr + '"',
cause: err.message
});
}
}
};
/**
* @param {Object|Array} graph
*/
RelationExpression.fromGraph = function fromGraph(graph) {
if (!graph) {
return new RelationExpression();
}
return new RelationExpression(modelGraphToNode(graph, newNode()));
};
/**
* @param {string|RelationExpression} expr
* @returns {RelationExpression}
*/
RelationExpression.prototype.merge = function merge(expr) {
var merged = this.clone();
expr = RelationExpression.parse(expr);
merged.numChildren += expr.numChildren;
merged.children = _lodash2.default.merge(merged.children, expr.children);
merged.args = _lodash2.default.merge(merged.args, expr.args);
merged.filters = _lodash2.default.merge(merged.filters, expr.filters);
// Handle recursive and all recursive nodes.
visit(merged, function (node, childNames) {
var maxName = null;
var maxDepth = 0;
var recurCount = 0;
for (var i = 0, l = childNames.length; i < l; ++i) {
var name = childNames[i];
var depth = _maxRecursionDepth(name);
if (depth > 0) {
recurCount++;
}
if (depth > maxDepth) {
maxDepth = depth;
maxName = name;
}
}
if (recurCount > 0) {
delete node.children[node.name];
}
if (recurCount > 1) {
for (var _i = 0, _l = childNames.length; _i < _l; ++_i) {
var _name = childNames[_i];
if (_name !== maxName) {
delete node.children[_name];
}
}
}
});
return merged;
};
/**
* @param {string|RelationExpression} expr
* @returns {boolean}
*/
RelationExpression.prototype.isSubExpression = function isSubExpression(expr) {
var _this = this;
expr = RelationExpression.parse(expr);
if (this.isAllRecursive()) {
return true;
}
if (expr.isAllRecursive()) {
return this.isAllRecursive();
}
if (this.name !== expr.name) {
return false;
}
var maxRecursionDepth = expr.maxRecursionDepth();
if (maxRecursionDepth > 0) {
return this.isAllRecursive() || this.maxRecursionDepth() >= maxRecursionDepth;
}
return _lodash2.default.every(expr.children, function (child, childName) {
var ownSubExpression = _this.childExpression(childName);
var subExpression = expr.childExpression(childName);
return ownSubExpression && ownSubExpression.isSubExpression(subExpression);
});
};
/**
* @returns {number}
*/
RelationExpression.prototype.maxRecursionDepth = function maxRecursionDepth() {
if (this.numChildren !== 1) {
return 0;
}
var key = (0, _keys2.default)(this.children)[0];
return _maxRecursionDepth(key);
};
/**
* @returns {boolean}
*/
RelationExpression.prototype.isAllRecursive = function isAllRecursive() {
if (this.numChildren !== 1) {
return false;
}
var key = (0, _keys2.default)(this.children)[0];
return ALL_RECURSIVE_REGEX.test(key);
};
/**
* @returns {RelationExpression}
*/
RelationExpression.prototype.childExpression = function childExpression(childName) {
if (this.isAllRecursive() || childName === this.name && this._recursionDepth < this.maxRecursionDepth() - 1) {
return new RelationExpression(this, this._recursionDepth + 1, this._filters);
}
if (this.children[childName]) {
return new RelationExpression(this.children[childName], 0, this._filters);
} else {
return null;
}
};
/**
* @returns {RelationExpression}
*/
RelationExpression.prototype.clone = function clone() {
var node = {
name: this.name,
args: this.args,
numChildren: this.numChildren,
children: _lodash2.default.cloneDeep(this.children)
};
var filters = _lodash2.default.clone(this._filters);
return new RelationExpression(node, this._recursionDepth, filters);
};
RelationExpression.prototype.forEachChild = function forEachChild(cb) {
_lodash2.default.forOwn(this.children, function (child, childName) {
if (!ALL_RECURSIVE_REGEX.test(childName) && !RECURSIVE_REGEX.test(childName)) {
cb(child, childName);
}
});
};
/**
* @param {string|RelationExpression} path
* @param {function(QueryBuilder)} filter
*/
RelationExpression.prototype.addAnonymousFilterAtPath = function addAnonymousFilterAtPath(path, filter) {
var filterNodes = this._nodesAtPath(path);
var filters = this.filters;
var idx = 0;
var filterName = '_efe0_';
while (filters[filterName]) {
filterName = '_efe' + ++idx + '_';
}
if (!_lodash2.default.isEmpty(filterNodes)) {
filters[filterName] = filter;
_lodash2.default.each(filterNodes, function (node) {
return node.args.push(filterName);
});
}
};
/**
* @returns {string}
*/
RelationExpression.prototype.toString = function toString() {
return _toString(this);
};
/**
* @private
* @return {Array.<Object>}
*/
RelationExpression.prototype._nodesAtPath = function _nodesAtPath(pathExpression) {
var path = RelationExpression.parse(pathExpression);
var nodes = [];
RelationExpression.nodesAtPath(this, path, nodes);
return nodes;
};
/**
* @private
*/
RelationExpression.nodesAtPath = function nodesAtPath(target, path, expressions) {
var _this2 = this;
if (path.numChildren == 0) {
expressions.push(target);
} else {
_lodash2.default.forOwn(path.children, function (child) {
var targetChild = target.children[child.name];
if (targetChild) {
_this2.nodesAtPath(targetChild, child, expressions);
}
});
}
};
(0, _createClass3.default)(RelationExpression, [{
key: 'filters',
get: function get() {
return this._filters;
},
set: function set(filters) {
this._filters = filters || {};
}
}]);
return RelationExpression;
}();
exports.default = RelationExpression;
function _maxRecursionDepth(key) {
var rec = RECURSIVE_REGEX.exec(key);
if (rec) {
var maxDepth = rec[1];
if (maxDepth) {
return parseInt(maxDepth, 10);
} else {
return Number.POSITIVE_INFINITY;
}
} else {
return 0;
}
}
function visit(node, visitor) {
var keys = (0, _keys2.default)(node.children);
visitor(node, keys);
for (var i = 0, l = keys.length; i < l; ++i) {
var key = keys[i];
var childNode = node.children[key];
if (childNode) {
visit(childNode, visitor);
}
}
}
function _toString(node) {
var childExpr = _lodash2.default.values(node.children).map(_toString);
if (childExpr.length > 1) {
childExpr = '[' + childExpr.join(', ') + ']';
} else {
childExpr = childExpr[0];
}
var str = node.name;
if (node.args.length) {
str += '(' + node.args.join(', ') + ')';
}
if (childExpr) {
if (str) {
return str + '.' + childExpr;
} else {
return childExpr;
}
} else {
return str;
}
}
function modelGraphToNode(models, node) {
if (!models) {
return;
}
if (Array.isArray(models)) {
for (var i = 0, l = models.length; i < l; ++i) {
modelToNode(models[i], node);
}
} else {
modelToNode(models, node);
}
return node;
}
function modelToNode(model, node) {
var modelClass = model.constructor;
var relations = modelClass.getRelationArray();
for (var r = 0, lr = relations.length; r < lr; ++r) {
var relName = relations[r].name;
if (model.hasOwnProperty(relName)) {
var childNode = node.children[relName];
if (!childNode) {
childNode = newNode(relName);
node.children[relName] = childNode;
node.numChildren++;
}
modelGraphToNode(model[relName], childNode);
}
}
}
function newNode(name) {
return {
name: name || '',
args: [],
children: (0, _create2.default)(null),
numChildren: 0
};
}
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_ from 'lodash';\nimport parser from './parsers/relationExpressionParser';\nimport ValidationError from '../model/ValidationError';\n\nconst RECURSIVE_REGEX = /^\\^(\\d*)$/;\nconst ALL_RECURSIVE_REGEX = /^\\*$/;\n\nexport default class RelationExpression {\n\n  constructor(node, recursionDepth, filters) {\n    node = node || {};\n\n    this.name = node.name || null;\n    this.args = node.args || [];\n    this.numChildren = node.numChildren || 0;\n    this.children = node.children || {};\n\n    Object.defineProperty(this, '_recursionDepth', {\n      enumerable: false,\n      value: recursionDepth || 0\n    });\n\n    Object.defineProperty(this, '_filters', {\n      enumerable: false,\n      writable: true,\n      value: filters || {}\n    });\n  }\n\n  /**\n   * @param {string|RelationExpression} expr\n   * @returns {RelationExpression}\n   */\n  static parse(expr) {\n    if (expr instanceof RelationExpression) {\n      return expr;\n    } else if (!_.isString(expr) || _.isEmpty(expr.trim())) {\n      return new RelationExpression();\n    } else {\n      try {\n        return new RelationExpression(parser.parse(expr));\n      } catch (err) {\n        throw new ValidationError({\n          message: 'Invalid relation expression \"' + expr + '\"',\n          cause: err.message\n        });\n      }\n    }\n  }\n\n  /**\n   * @param {Object|Array} graph\n   */\n  static fromGraph(graph) {\n    if (!graph) {\n      return new RelationExpression();\n    }\n\n    return new RelationExpression(modelGraphToNode(graph, newNode()));\n  }\n\n  get filters() {\n    return this._filters;\n  }\n\n  set filters(filters) {\n    this._filters = filters || {};\n  }\n\n  /**\n   * @param {string|RelationExpression} expr\n   * @returns {RelationExpression}\n   */\n  merge(expr) {\n    const merged = this.clone();\n    expr = RelationExpression.parse(expr);\n\n    merged.numChildren += expr.numChildren;\n    merged.children = _.merge(merged.children, expr.children);\n    merged.args = _.merge(merged.args, expr.args);\n    merged.filters = _.merge(merged.filters, expr.filters);\n\n    // Handle recursive and all recursive nodes.\n    visit(merged, (node, childNames) => {\n      let maxName = null;\n      let maxDepth = 0;\n      let recurCount = 0;\n\n      for (let i = 0, l = childNames.length; i < l; ++i) {\n        const name = childNames[i];\n        const depth = maxRecursionDepth(name);\n\n        if (depth > 0) {\n          recurCount++;\n        }\n\n        if (depth > maxDepth) {\n          maxDepth = depth;\n          maxName = name;\n        }\n      }\n\n      if (recurCount > 0) {\n        delete node.children[node.name];\n      }\n\n      if (recurCount > 1) {\n        for (let i = 0, l = childNames.length; i < l; ++i) {\n          const name = childNames[i];\n\n          if (name !== maxName) {\n            delete node.children[name];\n          }\n        }\n      }\n    });\n\n    return merged;\n  }\n\n  /**\n   * @param {string|RelationExpression} expr\n   * @returns {boolean}\n   */\n  isSubExpression(expr) {\n    expr = RelationExpression.parse(expr);\n\n    if (this.isAllRecursive()) {\n      return true;\n    }\n\n    if (expr.isAllRecursive()) {\n      return this.isAllRecursive();\n    }\n\n    if (this.name !== expr.name) {\n      return false;\n    }\n\n    const maxRecursionDepth = expr.maxRecursionDepth();\n\n    if (maxRecursionDepth > 0) {\n      return this.isAllRecursive() || this.maxRecursionDepth() >= maxRecursionDepth;\n    }\n\n    return _.every(expr.children, (child, childName) => {\n      var ownSubExpression = this.childExpression(childName);\n      var subExpression = expr.childExpression(childName);\n\n      return ownSubExpression && ownSubExpression.isSubExpression(subExpression);\n    });\n  }\n\n  /**\n   * @returns {number}\n   */\n  maxRecursionDepth() {\n    if (this.numChildren !== 1) {\n      return 0;\n    }\n\n    const key = Object.keys(this.children)[0];\n    return maxRecursionDepth(key);\n  }\n\n  /**\n   * @returns {boolean}\n   */\n  isAllRecursive() {\n    if (this.numChildren !== 1) {\n      return false;\n    }\n\n    const key = Object.keys(this.children)[0];\n    return ALL_RECURSIVE_REGEX.test(key);\n  }\n\n  /**\n   * @returns {RelationExpression}\n   */\n  childExpression(childName) {\n    if (this.isAllRecursive() || (childName === this.name && this._recursionDepth < this.maxRecursionDepth() - 1)) {\n      return new RelationExpression(this, this._recursionDepth + 1, this._filters);\n    }\n\n    if (this.children[childName]) {\n      return new RelationExpression(this.children[childName], 0, this._filters);\n    } else {\n      return null;\n    }\n  }\n\n  /**\n   * @returns {RelationExpression}\n   */\n  clone() {\n    const node = {\n      name: this.name,\n      args: this.args,\n      numChildren: this.numChildren,\n      children: _.cloneDeep(this.children)\n    };\n\n    const filters = _.clone(this._filters);\n    return new RelationExpression(node, this._recursionDepth, filters);\n  }\n\n  forEachChild(cb) {\n    _.forOwn(this.children, (child, childName) => {\n      if (!ALL_RECURSIVE_REGEX.test(childName) && !RECURSIVE_REGEX.test(childName)) {\n        cb(child, childName);\n      }\n    });\n  }\n\n  /**\n   * @param {string|RelationExpression} path\n   * @param {function(QueryBuilder)} filter\n   */\n  addAnonymousFilterAtPath(path, filter) {\n    let filterNodes = this._nodesAtPath(path);\n    let filters = this.filters;\n\n    let idx = 0;\n    let filterName = `_efe0_`;\n\n    while (filters[filterName]) {\n      filterName = `_efe${++idx}_`;\n    }\n\n    if (!_.isEmpty(filterNodes)) {\n      filters[filterName] = filter;\n      _.each(filterNodes, node => node.args.push(filterName));\n    }\n  }\n\n  /**\n   * @returns {string}\n   */\n  toString() {\n    return toString(this);\n  }\n\n  /**\n   * @private\n   * @return {Array.<Object>}\n   */\n  _nodesAtPath(pathExpression) {\n    let path = RelationExpression.parse(pathExpression);\n    let nodes = [];\n\n    RelationExpression.nodesAtPath(this, path, nodes);\n    return nodes;\n  }\n\n  /**\n   * @private\n   */\n  static nodesAtPath(target, path, expressions) {\n    if (path.numChildren == 0) {\n      expressions.push(target);\n    } else {\n      _.forOwn(path.children, child => {\n        const targetChild = target.children[child.name];\n\n        if (targetChild) {\n          this.nodesAtPath(targetChild, child, expressions);\n        }\n      });\n    }\n  }\n}\n\nfunction maxRecursionDepth(key) {\n  const rec = RECURSIVE_REGEX.exec(key);\n\n  if (rec) {\n    const maxDepth = rec[1];\n\n    if (maxDepth) {\n      return parseInt(maxDepth, 10);\n    } else {\n      return Number.POSITIVE_INFINITY;\n    }\n  } else {\n    return 0;\n  }\n}\n\nfunction visit(node, visitor) {\n  const keys = Object.keys(node.children);\n\n  visitor(node, keys);\n\n  for (let i = 0, l = keys.length; i < l; ++i) {\n    const key = keys[i];\n    const childNode = node.children[key];\n\n    if (childNode) {\n      visit(childNode, visitor);\n    }\n  }\n}\n\n\nfunction toString(node) {\n  let childExpr = _.values(node.children).map(toString);\n\n  if (childExpr.length > 1) {\n    childExpr = `[${childExpr.join(', ')}]`;\n  } else {\n    childExpr = childExpr[0];\n  }\n\n  let str = node.name;\n\n  if (node.args.length) {\n    str += `(${node.args.join(', ')})`;\n  }\n\n  if (childExpr) {\n    if (str) {\n      return `${str}.${childExpr}`;\n    } else {\n      return childExpr;\n    }\n  } else {\n    return str;\n  }\n}\n\nfunction modelGraphToNode(models, node) {\n  if (!models) {\n    return;\n  }\n\n  if (Array.isArray(models)) {\n    for (let i = 0, l = models.length; i < l; ++i) {\n      modelToNode(models[i], node);\n    }\n  } else {\n    modelToNode(models, node);\n  }\n\n  return node;\n}\n\nfunction modelToNode(model, node) {\n  const modelClass = model.constructor;\n  const relations = modelClass.getRelationArray();\n\n  for (let r = 0, lr = relations.length; r < lr; ++r) {\n    const relName = relations[r].name;\n\n    if (model.hasOwnProperty(relName)) {\n      let childNode = node.children[relName];\n\n      if (!childNode) {\n        childNode = newNode(relName);\n\n        node.children[relName] = childNode;\n        node.numChildren++;\n      }\n\n      modelGraphToNode(model[relName], childNode);\n    }\n  }\n}\n\nfunction newNode(name) {\n  return {\n    name: name || '',\n    args: [],\n    children: Object.create(null),\n    numChildren: 0\n  };\n}"]}