32 lines
947 B
JavaScript
32 lines
947 B
JavaScript
'use strict';
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const MongooseError = require('../../error/mongooseError');
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/**
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* A query thunk is the function responsible for sending the query to MongoDB,
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* like `Query#_findOne()` or `Query#_execUpdate()`. The `Query#exec()` function
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* calls a thunk. The term "thunk" here is the traditional Node.js definition:
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* a function that takes exactly 1 parameter, a callback.
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*
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* This function defines common behavior for all query thunks.
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* @param {Function} fn
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* @api private
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*/
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module.exports = function wrapThunk(fn) {
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return function _wrappedThunk(cb) {
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if (this._executionStack != null) {
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let str = this.toString();
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if (str.length > 60) {
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str = str.slice(0, 60) + '...';
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}
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const err = new MongooseError('Query was already executed: ' + str);
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err.originalStack = this._executionStack.stack;
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return cb(err);
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}
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this._executionStack = new Error();
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fn.call(this, cb);
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};
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};
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