// Helpers
// ---------------
'use strict';
var _ = require('lodash');
var chalk = require('chalk');
var helpers = {
// Sets the constraints necessary during a `model.save` call.
saveConstraints: function saveConstraints(model, relatedData) {
var data = {};
if (relatedData && !relatedData.isThrough() && relatedData.type !== 'belongsToMany' && relatedData.type !== 'belongsTo') {
data[relatedData.key('foreignKey')] = relatedData.parentFk || model.get(relatedData.key('foreignKey'));
if (relatedData.isMorph()) data[relatedData.key('morphKey')] = relatedData.key('morphValue');
}
return model.set(model.parse(data));
},
// Finds the specific `morphTo` table we should be working with, or throws
// an error if none is matched.
morphCandidate: function morphCandidate(candidates, foreignTable) {
var Target = _.find(candidates, function (Candidate) {
return _.result(Candidate.prototype, 'tableName') === foreignTable;
});
if (!Target) {
throw new Error('The target polymorphic model was not found');
}
return Target;
},
// If there are no arguments, return the current object's
// query builder (or create and return a new one). If there are arguments,
// call the query builder with the first argument, applying the rest.
// If the first argument is an object, assume the keys are query builder
// methods, and the values are the arguments for the query.
query: function query(obj, args) {
// Ensure the object has a query builder.
if (!obj._knex) {
var tableName = _.result(obj, 'tableName');
obj._knex = obj._builder(tableName);
}
// If there are no arguments, return the query builder.
if (args.length === 0) return obj._knex;
var method = args[0];
if (_.isFunction(method)) {
// `method` is a query builder callback. Call it on the query builder
// object.
method.call(obj._knex, obj._knex);
} else if (_.isObject(method)) {
// `method` is an object. Use keys as methods and values as arguments to
// the query builder.
for (var key in method) {
var target = _.isArray(method[key]) ? method[key] : [method[key]];
obj._knex[key].apply(obj._knex, target);
}
} else {
// Otherwise assume that the `method` is string name of a query builder
// method, and use the remaining args as arguments to that method.
obj._knex[method].apply(obj._knex, args.slice(1));
}
return obj;
},
error: function error(msg) {
console.log(chalk.red(msg));
},
warn: function warn(msg) {
console.log(chalk.yellow(msg));
},
deprecate: function deprecate(a, b) {
helpers.warn(a + ' has been deprecated, please use ' + b + ' instead');
}
};
module.exports = helpers; |