mongodb - 如何查询Breeze.js knockout.js mongoHQ curl

Question

如何使用 Breeze 从 MongoHQ 获取数据？到目前为止，我已经试过了:

this.getDataFormServer = function (formElement) {

    $.ajax({    
        url: "https://api.mongohq.com/databases/mydataBase/collections/customers/documents?_apikey=aabbddkkddiieeoollddd33kk3",
        type: "GET",
        data: {},
        datatype: "json",
        processData: false,
        contentType: "application/json; charset=utf-8",
        success: function (resultSuccess) {
            //alert("Success: " + JSON.stringify(resultSuccess));    
            console.log(resultSuccess);
        },
        complete: function (response) {
            //alert('your datas are now saved');
        },
        error: function (xhr, status, error) {
            console.log(status);
        }
    });
}

它运行良好，但现在我想对 Breeze 做同样的事情，这就是我所拥有的:

<!-- Knockout template -->
<ul data-bind="foreach: results">
  <li>
    <span data-bind="text:FirstName"></span>
    <span data-bind="text:LastName"></span>
  </li>
</ul>

从查询绑定(bind)到员工:

manager.executeQuery(breeze.EntityQuery.from("Customers"))
   .then(function(data){ 
       ko.applyBindings(data);
    });

谁能帮我解决这个问题？谢谢。

更新:我在这里做错了什么

 this.getDataFormServer = function (formElement) {
            var EntityQuery = breeze.EntityQuery;
            var manager = new breeze.EntityManager('https://api.mongohq.com/databases/myMongoHq/collections/customers/documents?_apikey=aelctgd3p3czwh6zx5uy&limit=4');

            var getRemoteDocuments = function () {
                var query = EntityQuery.from('documents');
                return manager.executeQuery(query)
                    .then(querySucceeded)
                    .fail(queryFailed);
            };
            function querySucceeded(data) { console.log('Retrieved documents from remote data source'); }
            function queryFailed(data) { console.log('Failed to retrieve documents from remote data source'); }

            var getLocaldocuments = function () {
                console.log("getLocals called");

                var newQuery = new EntityQuery('documents');
                var Documents = manager.executeQueryLocally(newQuery);
                if (Documents) console.log("retrieved some cars from local cache");
                else console.log("no cars retrieved from local cache");
            };

            getRemoteDocuments().then(getLocaldocuments);

        }

在控制台我只能看到这个:

Failed to retrieve documents from remote data source anfrageerstellen.js:222
getLocals called 

Answer 1

我还没有真正看到你的问题是什么，所以我只是想尝试一下。查看我将任何 API 与 Breeze 结合使用制作的示例片段，这可能有助于找到如何连接到您的 API，在这种情况下，它似乎是托管 Mongo DB 的服务器。在不知道您遇到的任何问题的情况下，很难给出更具体的建议 -

这是一个数据上下文示例，您可以将其用作路线图 -

function () {
    var EntityQuery = breeze.EntityQuery;

    var serviceName = 'https://api.mongohq.com/databases/mydataBase/collections/customers/'

    var myAPIKEY = "yourkeygoeshere";

    var ds = new breeze.DataService({
        serviceName: serviceName,
        // You will need to set your models up server side in a models class of some sort
        hasServerMetadata: false
    });

    function configureBreezeManager() {
        var mgr = new breeze.EntityManager({ dataService: ds });
        return mgr;
    }

    var manager = configureBreezeManager();

    // Create your models in a model file or something 
    model.initialize(manager.metadataStore);

    var metadataStore = manager.metadataStore;

    var getDocuments = function () {
        var parameters = makeParameters();
        var query = breeze.EntityQuery
            .from("documents")
            .withParameters(parameters)
            .toType('Documents');

        return manager.executeQuery(query).then(querySucceeded).fail(queryFailed);

        function querySucceeded(data) {
            return data.results;
        }
    };

    function makeParameters(addlParameters) {
        var parameters = {
            apikey: myAPIKEY
        };
        return breeze.core.extend(parameters, addlParameters);
    }

    function queryFailed(error) {
        console.log('Error retrieving data. ' + error.message);
    }
});

不知道这是否是您正在寻找的，您可能还需要做更多工作，例如设置您的模型，如果您要从服务器返回复杂的结构，您可能需要将它们映射回您的对象等......但至少这应该让您从服务器返回相同的数据。如果没有，并且您遇到任何错误，请告诉我原因，我会尽力提供帮助。

祝你好运。