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Can you perform CRUD on CouchDB view?


Can you perform CRUD on CouchDB view?

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Can you perform CRUD on CouchDB view?
Tag : php , By : MrSparky
Date : November 26 2020, 06:28 AM

Does that help No. Views in CouchDB are read-only versions of the data in the database (the same is true in most or all databases, including MySQL, Postgres, etc). To perform the C, U and D portions of CRUD, you need to use the rest of the CouchDB API.
To create or update, typically use PUT /{db}/{doc}, and for delete, use DELETE /{db}/{doc}.

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Creating temporary view in couchdb using node-couchdb-api


Tag : node.js , By : Ivan Kitanovski
Date : March 29 2020, 07:55 AM
I wish this help you sorry about the problem you were experiencing. I'm the creator of that module, and I've just pushed version 1.1.2 up to NPM which addresses your problem. (and includes a unit test to make sure it doesn't happen again)
Just update to the latest version via npm update couchdb-api and you should be set to go. Let me know if you have further issues.

set Key column info of binded grid view directly with database to perform CRUD? updation issue


Tag : chash , By : Marc Dong
Date : March 29 2020, 07:55 AM
I hope this helps you . Try this;
(GetChanges() method works with row events, so I used datagrid's RowValidated event.)
 private void dataGridView1_RowValidated(object sender, DataGridViewCellEventArgs e){
            SqlCommandBuilder cb;
            dt = new DataTable();
            dt = ((DataTable)dataGridView1.DataSource).GetChanges();
            if (ds != null)
            {
                cb = new SqlCommandBuilder(adp);
                adp.UpdateCommand = cb.GetUpdateCommand(true);
                adp.Update(dt);
            }

}
string newValue = "";
SqlCommand cmd;
string oldValue = "";

private void dataGridView1_CellBeginEdit(object sender, DataGridViewCellCancelEventArgs e)
{
      oldValue = dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString(); // store old value to add where 
}
  private void dataGridView1_CellValueChanged(object sender, DataGridViewCellEventArgs e)
    {
        SqlConnection c = new SqlConnection("Data Source=.;Initial Catalog=localdb;Persist Security Info=True;User ID=sa;Password=123");
        if (c.State != ConnectionState.Open)
        {
            c.Open();
        }
        string command = "";
        string columns = "";
        string columnName = dataGridView1.Columns[e.ColumnIndex].Name; // get column name of edited cell
        if (dataGridView1.Columns.Count != 1) // If there is only one column we dont have any where comparison, so we need oldValue of cell (we took value at cellbeginedit event)
        {
            for (int i = 0; i < dataGridView1.Columns.Count; i++)
            {
                if (i != e.ColumnIndex)
                {
                    columns += dataGridView1.Columns[i].Name + " = '" + dataGridView1.Rows[e.RowIndex].Cells[i].Value.ToString() + "' "; // compare statement according to other cells (assume that we don't have PK)
                }
                if ((i != dataGridView1.Columns.Count - 1) && (i != e.ColumnIndex))
                {
                    columns += " and ";

                }
            }
            command = "Update "+ ds.Customer.TableName +" set " + columnName + "=@newValue where " + columns;
        }
        else
        {
            command = "Update  " + ds.Customer.TableName + "  set  " + columnName + "=@newValue where ColumName=" + "'" + oldValue + "'";
        }
        newValue = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString(); //our new parameter.
        cmd = new SqlCommand(command, c);
        cmd.Parameters.AddWithValue("@newValue", newValue);
        cmd.ExecuteNonQuery();
        c.Close();

}

Which one is better approach for doing CRUD operation using CouchDB?


Tag : development , By : mediafarm
Date : March 29 2020, 07:55 AM
hop of those help? You mostly want to use Mango. A lot of efforts are put into this new feature to make queries easier to do.
It offers a lot of query functionalities and in the end, it's backed by views.

CouchDB validation on CRUD events


Tag : development , By : SpittingCAML
Date : March 29 2020, 07:55 AM
I wish this help you For those coming here that need to check for CRUD events on documents stored in a CouchDB database. I did some experiments to define how I could check for each of the CRUD events in a CouchDB design document.
I came up with this solution (these can be used inside the condition of an if statement):
newDoc !== null && oldDoc === null
newDoc !== null && oldDoc !== null
newDoc._deleted === true

CouchDb - Prevent couchDb from delivering a view


Tag : development , By : Mihai Mocanu
Date : March 29 2020, 07:55 AM
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