Question

我试图遵循pyorient的github自述文件中给出的示例。我尝试使用client.record_create插入二进制字段，并使用client.record_load加载相同的字段。

>>> client.db_create('animals', pyorient.DB_TYPE_DOCUMENT, pyorient.STORAGE_TYPE_MEMORY )
>>> cluster_id = client.command("create class animal")
>>> rec = { '@animal': { 'accommodation': 'house1', 'work': 'office1', 'holiday': b'\xb8P\xa7\x00l|\xa7\x13\x8d\xc8\x80_M\xa0\x11V\xe3 ,G\x1d\xad \x08\xf5rZ\xafc\x16\x1c(' } }  
>>> rec_position = client.record_create( cluster_id[0], rec )
>>> loaded = client.record_load(rec_position._rid)
>>> loaded.oRecordData
{'holiday': None, 'work': 'office1', 'accommodation': 'house1'}

如您所见，检索到的二进制字段的值为None。 pyorient是否支持插入原始字节？如果没有，是否有一些解决方法？

Answer 1

不确定结果是否正确，但您可以尝试添加“”

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int TAM_BUFFER = 75; 

int main(int argc, char *argv[]){
    char fileoutputname[15] = {0};
    char buffer[TAM_BUFFER];

    FILE *arquivo = fopen("Entrada.txt", "r");
    FILE *saida;

    if(arquivo == NULL){
        perror("fopen");
        exit(EXIT_FAILURE);
    }

    fscanf(arquivo, "%14c", fileoutputname);//first split file name
    saida = fopen(fileoutputname, "w");
    rewind(arquivo);

    while(fgets(buffer, sizeof buffer, arquivo)){
        if(strncmp(buffer,"NEWDAY", 6) == 0){ // strlen("NEWDAY") is 6
            long file_pos = ftell(arquivo);//or use fgetpos for large file, save file position
            fscanf(arquivo, "%14c", fileoutputname);//next file name
            fseek(arquivo, file_pos, SEEK_SET);//or use fsetpos (pair with fgetpos), restore file position
            saida = freopen(fileoutputname, "w", saida);//fclose(saida);saida=fopen(fileoutputname, "w");
        }
        fprintf(saida,"%s", buffer);//No add newline
    }
    fclose(arquivo);
    fclose(saida);
    return 0;
}

如何使用pyorient在orientdb中存储和检索二进制数据？

1 个答案: