Question

对不起，我正在编辑我的问题。我真正的问题是弄清楚如何在fillMapArray函数的$ csv_Column_name与readRow函数中存储在$ Csv_header_array中的值之间进行比较。此问题与两个csv一个表问题有关，因为存储csv列名称的maps表有两个csv文件加载到其中。

public $table;
public $filename;
public $insert_chunk_size = 500;
public $csv_delimiter = ',';
public $offset_rows = 1;
// Array to store Database column names
public $mapping = [];
public function setTableName($tablename)
{
    $this->table = $tablename;
}
public function setFileName($filename)
{
    $this->filename = $filename;
}
public function setColumnMapping()
{
    //Retrieve the column names of the table
    // and store them in the array
    $columns = Schema::getColumnListing($this->table);
    $i = 0;
    while ($i < (sizeof($columns) - 1)) {
        array_push($this->mapping, $columns[$i+1]);
        $i++;
    }
}
public function openCSV($filename)
{
    if (!file_exists($filename) || !is_readable($filename)) {
        Log::error("CSV insert failed" . $filename . "does not exist or is not readable");
    }
    $handle = fopen($filename, 'r');
    return $handle;
}
public function seedFromCSV($filename, $deliminator = ',')
{
    $handle = $this->openCSV($filename);
    // CSV doesn't exist or couldn't be read from.
    if ( $handle === FALSE )
        return [];
    $header = NULL;
    $row_count = 0;
    $data = [];
    // Array to store CSV Header column names
    $Csv_header_array = [];
    $mapping = $this->mapping ?: [];
    $offset = $this->offset_rows;
    while ( ($row = fgetcsv($handle, 0, $deliminator)) !== FALSE )
    {
        // Offset the specified number of rows
        while ( $offset > 0 )
        {
            //If the row being read is the first,
            //store the CSV header names in the array
            $index = 0;
            while ($index < sizeof($row)) {
                array_push($Csv_header_array, $row[$index]);
                $index++;
            }
            $offset--;
            continue 2;
        }
        // No mapping specified - grab the first CSV row and use it
        if ( !$mapping )
        {
            $mapping = $row;
        }
        else
        {
            // Array to store a map of CSV column headers
            // to the corresponding values
            $source_array = $this->readRow($row, $Csv_header_array);
            // Create a map of database column names to
            // the corresponding values
            $row = $this->fillMapArray($source_array, $mapping);
            // insert only non-empty rows from the csv file
            if ( !$row )
                continue;
            $data[$row_count] = $row;
            // Chunk size reached, insert
            if ( ++$row_count == $this->insert_chunk_size )
            {
                //var_dump($this->insert($data));
                $this->insert($data);
                $row_count = 0;
                //var_dump($data[0]);
                // clear the data array explicitly to
                // avoid duplicate inserts
                $data = array();
            }
        }
    }
    // Insert any leftover rows
    if ( count($data)  )
        $this->insert($data);
    fclose($handle);
    return $data;
}
public function readRow( array $row, array $Csv_header_array )
{
    // Read the values of CSV column headers and map them
    // into an array
    $source_array = [];
    foreach ($Csv_header_array as $index => $csvCol) {
        if (!isset($row[$index]) || $row[$index] === '') {
            $source_array[$csvCol] = NULL;
        }
        else {
            $source_array[$csvCol] = $row[$index];
        }
    }
    return $source_array;
}
public function fillMapArray($source_array, $mapping) {
    $row_values = [];
    $columns = Schema::getColumnListing('maps');
    $no_of_columns_to_fill = sizeof($source_array);
    // Retrieve the CSV column header corresponding to
    // the Database column and store in a map
    foreach($mapping as $dbCol) {
        if ($dbCol === 'year') {
            $row_values[$dbCol] = 2014;
        } else {
            if ($dbCol === 'School_ID') {
                $temp1 = DB::Table('schools')->where('Unit_Id', '=',
                    $source_array['UNITID'])->value('School_ID');
                $row_values[$dbCol] = $temp1;
            } else {
                if ($no_of_columns_to_fill > 0) {
                    $csv_Column_name = DB::Table('maps')->where($columns[3], '=', $this->table)
                        ->where($columns[1], $dbCol)->value($columns[2]);
                    if ($csv_Column_name === Null) {
                        $no_of_columns_to_fill--;
                    } else {
                        $row_values[$dbCol] = $source_array[$csv_Column_name];
                        $no_of_columns_to_fill--;
                    }
                }
            }
        }
    }
    //var_dump($row_values);
    return $row_values;
}
public function insert( array $seedData )
{
    try {
        DB::table($this->table)->insert($seedData);
    } catch (\Exception $e) {
        Log::error("CSV insert failed: " . $e->getMessage() . " - CSV " . $this->filename);
        return FALSE;
    }
    return TRUE;
}

}

Answer 1

您可以使用Maatwebsite Laravel Excel包获取CSV数据，然后将其映射到Eloquent模型。例如，如果您的CSV表格为users，那么您的模型将为User

因此，您可以从CSV中提取所有数据，然后将其映射到模型。

// This array will be created with the help of Laravel-Excel package
$users = array(
    array('name'=>'Coder 1', 'rep'=>'4096'),
    array('name'=>'Coder 2', 'rep'=>'2048'),
    //...
);

// your second CSV file will also perform similar task and map it to same array
$users[] = ['name' => 'Coder 3'];

// Start bulk insert
User::insert($users);

将csv列名与csv头数组进行比较

1 个答案: