英文:
store gridfs files information in a custom table
问题
我正在使用 mongodb 以及 Java Spring 平台作为存储系统来存储文件和文档。由于 MongoDB 有一个 15MB（Bson 存储限制）的文件存储限制，我已经使用了 GridFs 扩展来存储我的大文件。我已经按照以下方式实现了这部分内容：
DBObject metaData = new BasicDBObject();metaData.put("uplad_dateTime", largeDocument.getUploadDateTime());metaData.put("title", largeDocument.getName());ObjectId id =gridFsTemplate.store(largeDocument.getData(), largeDocument.getName(), largeDocument.getContentType(), metaData);largeDocument.setId(id.toString());
问题是，默认情况下，GridFS 使用两个集合 fs.chunck 和 fs.files，但我需要将文件信息与唯一文件 ID 存储在一个自定义文档模型中，如下所述：
@Setter@Getter@org.springframework.data.mongodb.core.mapping.Document(collection = "document")public class Document {@Idprivate String id;@NotNull@Column(name = "document_size", nullable = false)private long size;@NotNull@Column(name = "document_name", nullable = false)private String name;@NotNull@Column(name = "content_type", nullable = false)private String contentType;@NotNull@Column(name = "content_data", nullable = false)private InputStream data;@NotNull@Column(name = "upload_date_time", nullable = false)private LocalDateTime uploadDateTime;@Column(name = "download_counter", nullable = false)private long downloadCounter;// ...（Builder 类的定义和方法）}
我该如何更改 GridFS，以便将文件信息存储在我的模型中，而不是 fs.files 中？非常感谢您的帮助。
英文:
I am using mongodb along with a java spring platform as my storage system to store files and documents. As mongo has a limit of 15MB(Bson storage limit) to store files I have used GridFs extension to store my large files. I have implemented this part as follow:
DBObject metaData = new BasicDBObject();metaData.put("uplad_dateTime", largeDocument.getUploadDateTime());metaData.put("title", largeDocument.getName());ObjectId id =gridFsTemplate.store(largeDocument.getData(), largeDocument.getName(), largeDocument.getContentType(), metaData);largeDocument.setId(id.toString());
The problem is that Gridfs by default uses two fs.chunck and fs.files collections, But I need to store files information with unique file id in a custom document model described here:
@Setter@Getter@org.springframework.data.mongodb.core.mapping.Document(collection = "document")public class Document {@Idprivate String id;@NotNull@Column(name = "document_size", nullable = false)private long size;@NotNull@Column(name = "document_name", nullable = false)private String name;@NotNull@Column(name = "content_type", nullable = false)private String contentType;@NotNull@Column(name = "content_data", nullable = false)private InputStream data;@NotNull@Column(name = "upload_date_time", nullable = false)private LocalDateTime uploadDateTime;@Column(name = "download_counter", nullable = false)private long downloadCounter;public static Builder builder() {return new Builder();}public static final class Builder {private Document document;private Builder() {document = new Document();document.setUploadDateTime(LocalDateTime.now());}public Builder id(String id) {document.setId(id);return this;}public Builder size(long size) {document.setSize(size);return this;}public Builder name(String name) {document.setName(name);return this;}public Builder contentType(String contentType) {document.setContentType(contentType);return this;}public Builder data(InputStream data) {document.setData(data);return this;}public Builder uploadDateTime(LocalDateTime uploadDateTime) {document.setUploadDateTime(uploadDateTime);return this;}public Builder downloadCounter(long downloadCounter) {document.setDownloadCounter(downloadCounter);return this;}public Document build() {return document;}}
}
How can I change Gridfs to store file information in my model instead of fs.files? I appreciate any help.
答案1
得分: 0
首先，gridfs提供了一个功能，可以将任意元数据与上传的文件关联起来。这应该适用于大多数用例。
如果您需要将应用程序对象与上传的文件关联，必须将其存储在单独的集合中。
英文:
First, gridfs provides a facility to associate arbitrary metadata with the uploaded files. This should serve most use cases.
If you require an application object associated with uploaded files, it must be stored in a separate collection.
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