Extjs Grid 不显示任何数据

发布于 2024-10-08 12:46:02 字数 2528 浏览 4 评论 0原文

我创建了以下网格组件:

MyApp.grids.RelationshipMemberGrid = Ext.extend(Ext.grid.GridPanel, {
    autoHeight: true,
    iconCls: 'icon-grid',
    title: 'Relationship Members',
    frame: true,
    viewConfig: { forceFit: true },
    relationshipId: null,
    documentId: null,

    initComponent: function () {
        if (this.verifyParameters()) {
            // Initiate functionality
            this.columns = this.buildColumns();
            this.view = this.buildView();
            this.store = this.buildStore();
            this.store.load();
        }

        MyApp.grids.RelationshipMemberGrid.superclass.initComponent.call(this);
    },

    verifyParameters: function () {
        // Verification code
    },

    buildColumns: function () {
        return [{
            header: 'Id',
            dataIndex: 'Id',
            sortable: true,
            width: 10
        }, {
            header: 'Type',
            dataIndex: 'ObjType',
            sortable: true,
            width: 10
        }, {
            header: 'Name',
            dataIndex: 'Name',
            sortable: true
        }];
    },

    buildView: function () {
        return new Ext.grid.GroupingView({
            forceFit: true,
            groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Members" : "Member"]})'
        });
    },

    buildStore: function () {
        return new Ext.data.GroupingStore({
            url: MyAppUrls.ListRelationshipMembers,
            baseParams: { relationshipId: this.relationshipId },
            root: 'data',
            fields: ['Id', 'ObjType', 'Name'],
            sortInfo: { field: 'Name', direction: 'ASC' },
            groupField: 'ObjType'
        });
    }
});

网格正确呈现,并且映射到 MyAppUrls.ListRelationshipMembers 的 URL 正确。正在检索数据,ListRelationshipMembers URL 返回以下 JSON:

{"data":[{"Id":1,"ObjType":"topic","Name":"Test2"}]}

然而,即使呈现网格(列、边框等),实际网格中也不会显示任何数据。由于这是我第一次使用数据存储,我不确定我做错了什么。任何帮助将不胜感激。

编辑

我尝试通过以下代码更新商店以拥有阅读器:

    return new Ext.data.GroupingStore({
        url: MyAppUrls.ListRelationshipMembers,
        baseParams: { relationshipId: this.relationshipId },
        fields: ['Id', 'ObjType', 'Name'],
        sortInfo: { field: 'Name', direction: 'ASC' },
        reader: new Ext.data.JsonReader({
            root: 'data' 
        }),
        groupField: 'ObjType'
    });

没有变化,数据网格没有填充记录

I created the following grid component:

MyApp.grids.RelationshipMemberGrid = Ext.extend(Ext.grid.GridPanel, {
    autoHeight: true,
    iconCls: 'icon-grid',
    title: 'Relationship Members',
    frame: true,
    viewConfig: { forceFit: true },
    relationshipId: null,
    documentId: null,

    initComponent: function () {
        if (this.verifyParameters()) {
            // Initiate functionality
            this.columns = this.buildColumns();
            this.view = this.buildView();
            this.store = this.buildStore();
            this.store.load();
        }

        MyApp.grids.RelationshipMemberGrid.superclass.initComponent.call(this);
    },

    verifyParameters: function () {
        // Verification code
    },

    buildColumns: function () {
        return [{
            header: 'Id',
            dataIndex: 'Id',
            sortable: true,
            width: 10
        }, {
            header: 'Type',
            dataIndex: 'ObjType',
            sortable: true,
            width: 10
        }, {
            header: 'Name',
            dataIndex: 'Name',
            sortable: true
        }];
    },

    buildView: function () {
        return new Ext.grid.GroupingView({
            forceFit: true,
            groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Members" : "Member"]})'
        });
    },

    buildStore: function () {
        return new Ext.data.GroupingStore({
            url: MyAppUrls.ListRelationshipMembers,
            baseParams: { relationshipId: this.relationshipId },
            root: 'data',
            fields: ['Id', 'ObjType', 'Name'],
            sortInfo: { field: 'Name', direction: 'ASC' },
            groupField: 'ObjType'
        });
    }
});

The grid renders correctly, and the URL that is mapped to MyAppUrls.ListRelationshipMembers is correct. The data is being retrieved, and the ListRelationshipMembers URL is returning the following JSON:

{"data":[{"Id":1,"ObjType":"topic","Name":"Test2"}]}

Yet, even though the grid is rendered (columns, borders, etc..) no data is showing in the actual grid though. Since this is my first time using a data store, I am unsure of what I am doing wrong. Any help would be appreciative.

Edit:

I tried updating the store to have a reader via the following code:

    return new Ext.data.GroupingStore({
        url: MyAppUrls.ListRelationshipMembers,
        baseParams: { relationshipId: this.relationshipId },
        fields: ['Id', 'ObjType', 'Name'],
        sortInfo: { field: 'Name', direction: 'ASC' },
        reader: new Ext.data.JsonReader({
            root: 'data' 
        }),
        groupField: 'ObjType'
    });

No change, the datagrid is not being filled with the records

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评论(3

围归者 2024-10-15 12:46:02

埃文是对的。你最大的问题是缺乏读者。该和您留在其中的验证存根需要返回 true。如果您不能直接将这段代码放入并使其工作,那么您还会遇到其他问题。

MyApp.grids.RelationshipMemberGrid = Ext.extend(Ext.grid.GridPanel, {
    autoHeight: true,
    iconCls: 'icon-grid',
    title: 'Relationship Members',
    frame: true,
    viewConfig: { forceFit: true },
    relationshipId: null,
    documentId: null,

        initComponent: function () {
        if (this.verifyParameters()) {
            // Initiate functionality
            this.columns = this.buildColumns();
            this.view = this.buildView();
            this.store = this.buildStore();
            this.store.load();
        }

        MyApp.grids.RelationshipMemberGrid.superclass.initComponent.call(this);
    },

    verifyParameters: function () {
        // Verification code
        return true;
    },

    buildColumns: function () {
        return [{
            header: 'Id',
            dataIndex: 'Id',
            sortable: true,
            width: 10
        }, {
            header: 'Type',
            dataIndex: 'ObjType',
            sortable: true,
            width: 10
        }, {
            header: 'Name',
            dataIndex: 'Name',
            sortable: true
        }];
    },

    buildView: function () {
        return new Ext.grid.GroupingView({
            forceFit: true,
            groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Members" : "Member"]})'
        });
    },

    buildStore: function () {
        return new Ext.data.GroupingStore({
            url: MyAppUrls.ListRelationshipMembers,
            baseParams: { relationshipId: this.relationshipId },
            reader: new Ext.data.JsonReader({
                root: 'data',
                fields: ['Id', 'ObjType', 'Name'],
                sortInfo: { field: 'Name', direction: 'ASC' },
                groupField: 'ObjType'
            })
        });
    }
});

Evan is correct. Your biggest problem is a lack of a reader. That and the validation stub you left in there needed to return true. If you can't just drop this code in and have it work you have some other problem.

MyApp.grids.RelationshipMemberGrid = Ext.extend(Ext.grid.GridPanel, {
    autoHeight: true,
    iconCls: 'icon-grid',
    title: 'Relationship Members',
    frame: true,
    viewConfig: { forceFit: true },
    relationshipId: null,
    documentId: null,

        initComponent: function () {
        if (this.verifyParameters()) {
            // Initiate functionality
            this.columns = this.buildColumns();
            this.view = this.buildView();
            this.store = this.buildStore();
            this.store.load();
        }

        MyApp.grids.RelationshipMemberGrid.superclass.initComponent.call(this);
    },

    verifyParameters: function () {
        // Verification code
        return true;
    },

    buildColumns: function () {
        return [{
            header: 'Id',
            dataIndex: 'Id',
            sortable: true,
            width: 10
        }, {
            header: 'Type',
            dataIndex: 'ObjType',
            sortable: true,
            width: 10
        }, {
            header: 'Name',
            dataIndex: 'Name',
            sortable: true
        }];
    },

    buildView: function () {
        return new Ext.grid.GroupingView({
            forceFit: true,
            groupTextTpl: '{text} ({[values.rs.length]} {[values.rs.length > 1 ? "Members" : "Member"]})'
        });
    },

    buildStore: function () {
        return new Ext.data.GroupingStore({
            url: MyAppUrls.ListRelationshipMembers,
            baseParams: { relationshipId: this.relationshipId },
            reader: new Ext.data.JsonReader({
                root: 'data',
                fields: ['Id', 'ObjType', 'Name'],
                sortInfo: { field: 'Name', direction: 'ASC' },
                groupField: 'ObjType'
            })
        });
    }
});
柠檬色的秋千 2024-10-15 12:46:02

认为您需要在这里做几件事:首先,正如埃文提到的,您需要向您的商店添加一个阅读器,如下所示:

buildStore: function () {
    return new Ext.data.Store({
        url: MyAppUrls.ListRelationshipMembers,
        baseParams: { relationshipId: this.relationshipId },
        fields: ['Id', 'ObjType', 'Name'],
        sortInfo: { field: 'Name', direction: 'ASC' },
        reader: new Ext.data.JsonReader({
            root: 'data' 
        })
    });
}

我已将此处的商店类型更改为更简单的东西 - 是否有特殊原因使用分组存储?请注意,根是在读取器中指定的,而不是在存储本身中指定的。

然后,在您的列中,我倾向于添加一个渲染器来明确确定每列将显示的内容,例如:

buildColumns: function () {
    return [{
        header: 'Id',
        dataIndex: 'Id',
        sortable: true,
        width: 10,
        renderer: function (value, metaData, record) {
            return record.data.Id
        }
    } ... ];
}

我已经养成了使用渲染器的习惯,因为我在我的列单元格中修改了相当多的内容网格。注意这里传递给渲染器函数的参数;还有一些您可以传入 - 请参阅 ExtJS API 如果您需要有关实际可以访问的内容的更多信息。就这一点而言,API 文档非常好 - 它可能需要一些深入研究,但如果您经常使用 ExtJS,那么绝对值得您花时间。

Think you need to do a couple of things here: firstly, as mentioned by Evan, you need to add a reader to your store, like this:

buildStore: function () {
    return new Ext.data.Store({
        url: MyAppUrls.ListRelationshipMembers,
        baseParams: { relationshipId: this.relationshipId },
        fields: ['Id', 'ObjType', 'Name'],
        sortInfo: { field: 'Name', direction: 'ASC' },
        reader: new Ext.data.JsonReader({
            root: 'data' 
        })
    });
}

I've changed the store type here to something simpler - was there a particular reason you were using GroupingStore? Note that the root is specified in the reader, not the store itself.

Then, in your columns, I'd tend to add a renderer to explicitly determine what each column will display, such as:

buildColumns: function () {
    return [{
        header: 'Id',
        dataIndex: 'Id',
        sortable: true,
        width: 10,
        renderer: function (value, metaData, record) {
            return record.data.Id
        }
    } ... ];
}

I've got into the habit of using renderers, since I modify the content of my column cells quite heavily in my grids. Notice here the arguments being passed to the renderer function; there are a few more you can pass in - see the ExtJS API if you need more info on what you can actually access. On that note, the API documentation is pretty good - it can take some digging into but definitely worth your time if you're working with ExtJS a lot.

信愁 2024-10-15 12:46:02

您尚未在商店中指定阅读器,您需要在 JsonReader 中指定根。

You haven't specified a reader on your store, you need to specify the root in the JsonReader.

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