Rivet

0.9.1

Functions/Export-Row.ps1

<#
.SYNOPSIS
Export rows from a database as a migration where those rows get added using the `Add-Row` operation.
 
.DESCRIPTION
When getting your database working with Rivet, you may want to get some data exported into an initial migration. This script does that.
 
.EXAMPLE
Export-Row -SqlServerName .\Rivet -DatabaseName 'Rivet' -SchemaName 'rivet' -TableName 'Migrations' -Column 'MigrationID','RunAtUtc'
 
Demonstrates how to export the `MigrationID` and `RunAtUtc` columns of the `rivet.Migrations` table from the `.\Rivet.Rivet` database
#>
[CmdletBinding()]
param(
    [Parameter(Mandatory=$true)]
    [string]
    # The SQL Server to connect to.
    $SqlServerName,

    [Parameter(Mandatory=$true)]
    [string]
    # The name of the database.
    $DatabaseName,

    [string]
    # The schema of the table.
    $SchemaName = 'dbo',

    [Parameter(Mandatory=$true)]
    [string]
    # The name of the table.
    $TableName,

    [Parameter()]
    [string[]]
    # The columns to export.
    $Column,

    [string]
    # An orderBy clause to use to order the results.
    $OrderBy
)

#Require -Version 3
Set-StrictMode -Version Latest

$connectionString = 'Server={0};Database={1};Integrated Security=True;' -f $SqlServerName,$DatabaseName
    
$connection = New-Object Data.SqlClient.SqlConnection $connectionString
$columnClause = $Column -join ', '
$query = 'select {0} from {1}.{2}' -f $columnClause,$SchemaName,$TableName
if( $OrderBy )
{
    $query += ' order by {0}' -f $OrderBy
}
$cmd = New-Object Data.SqlClient.SqlCommand ($query,$connection)
    
$connection.Open()
try
{
    ' Add-Row -SchemaName ''{0}'' -TableName ''{1}'' -Column @('
    $cmdReader = $cmd.ExecuteReader()
    try
    {
        if( -not $cmdReader.HasRows )
        {
            return
        }
               
        while( $cmdReader.Read() )
        {
            ' @{'
            for ($i= 0; $i -lt $cmdReader.FieldCount; $i++) 
            { 
                if( $cmdReader.IsDbNull( $i ) )
                {
                    continue
                }
                $name = $cmdReader.GetName( $i )
                $value = $cmdReader.GetValue($i)
                if( $value -is [Boolean] )
                {
                    $value = if( $cmdReader.GetBoolean($i) ) { '1' } else { '0' }
                }
                elseif( $value -is [string] )
                {
                    $value = "'{0}'" -f $value.ToString().Replace("'","''")
                }
                elseif( $value -is [DAteTime] -or $value -is [Guid] )
                {
                    $value = "'{0}'" -f $value
                }
                else
                {
                    $value = $value.ToString()
                }
                
                ' {0} = {1};' -f $name,$value
            }
            ' },'
        }
    }
    finally
    {
        ' )'
        $cmdReader.Close()
    }
}
finally
{
    $cmd.Dispose()
    $connection.Close()
}