jaydata

问题 I am curious to know the advantages of using Jaydata with sqlite instead of using sqlite only. As I have found and experienced the difference seems is JSQL(Javascript Query Language) and its already built-in functions. Still,I am not convinced why to opt Jaydata as everyone is using it in their applications with offline db storage providers. Can someone kindly tell me its advantages. 回答1: disclaimer: I am one of the creators of JayData JayData is an abstract data management tool that supports

问题 This question came to the JayData forum but I decided to share it here as this is an interesting topic and maybe others can benefit from it too. by V3nom » Tue Oct 23, 2012 2:06 pm I struggle to find information on websql transactions in JayData. Can anyone give a hint or a link ? http://jaydata.org/forum/viewtopic.php?f=3&t=101&sid=8accd7bf5bed872b6e88d36004a280c5 回答1: Transactions are not an easy thing to support on a storage agnostic manner. Therefore there is no explicit transaction

问题 I am starting this new thread as a continuation of comments in: Consume Odata Service and get result in JSON The issue that I am facing is that I have upgraded to wcf data services 5.5 and wcf client tools 5.3 as recommended in the thread. And I am trying to perform a simple post to the following JayStorm service: https://open.jaystack.net/c72e6c4b-27ba-49bb-9321-e167ed03d00b/6494690e-1d5f-418d-adca-0ac515b7b742/api/mydatabase/ I generated the client service reference in .Net and am running

问题 I use JayData liberary and I want to know that it is possible to simulate inner join in JayData, like: Customers inner join Orders on Customers.CustomerID = Orders.CustomerID and how it could be possible? 回答1: AdHoc joins in general are not yet supported by JayData in the current release. It's on the roadmap though. It is however possible to achieve similar behavior on a number of ways, depending on your needs and the underlying data provider. I assume you are using the OData provider. In

问题 I've been using jaydata with TypeScript against an OData store as described here: http://jaystack.com/blog/typescript-meets-odata-with-the-help-of-jaydata-and-jaysvcutil. Now, I'm trying to extend the application to use a local store as well (say, webSql) but it appears the typescript declaration file only allows for an OData context to be instantiated. How can I use the declaration file while targeting a different storage provider? 回答1: I work for JayData. Sorry for the late reply. In

问题 I have some MongoDB documents with this schema: Id: {type: "id", key: true, computed: true, nullable: false}, Name: {type: "string", nullable: false, maxLength: 50} and these documents are exposed as OData by a small web application (I'm using Express, JayData, and Mongoose). These are some of those documents: { "_id" : ObjectId("5343fd656b9c5c084b8f2a70"), "Name" : "Service74"}, { "_id" : ObjectId("5343fd656b9c5c084b8f2a6f"), "Name" : "Service73"}, { "_id" : ObjectId(

问题 I try to implement my first JayData based application. I need my HTML5/JavaScript app to store complex data client-side (mostly one-to-many relations). My model looks like this (sorry if the names are not very explicit): I've tried to translate it with JayData, correct me if I'm wrong: $data.Entity.extend("Test", { Id: { type: "int", key: true, computed: true }, Name: { type: "string", required: true, maxLength: 200 }, Chapters: { type: Array, elementType: "Chapter", inverseProperty: "Test" }

问题 I need to send custom headers to my wcf oData Service but with the following function the headers dont get modified. entities.onReady(function () { entities.prepareRequest = function(r) { r[0].headers['APIKey'] = 'ABC'; }; entities.DataServiceClient.toArray(function (cli) { cli.forEach(function (c) { console.log(c.Name) }); }); }); headers are not affected. any clue? thanks! 回答1: It seems that the marked answer is incorrect. I was suffering from a similar issue, but got it working without

问题 I have some code which worked in JayData 1.3. I need to upgrade JayData to 1.5 due to the compatibility issues the 1.3 version has with polymer. The upgrade instructions say you can use the " jaydata-compatibility.js " script to "upgrade your app to JayData 1.5.x from previous versions step-by-step", however when I add that in as described I simply get the error, " typeOrName requires a value other than undefined or null ", which actually doesn't help me step through the upgrade at all. Here

问题 I'm building a web application with SAPUI5 which makes available a list of services, that are stored in a MongoDB and available as OData. I followed this guide jaydata-install-your-own-odata-server-with-nodejs-and-mongodb and these are my model.js: $data.Class.define("marketplace.Service", $data.Entity, null, { Id: {type: "id", key: true, computed: true, nullable: false}, Name: {type: "string", nullable: false, maxLength: 50}, }, null); $data.Class.defineEx("marketplace.Context", [$data