Problem with auto-generated numbers in an editable grid

Question

Hi! I created an editable grid in which the user can add new rows. When the user adds a new row, a number is auto-generated (1 for the first row, 2 for the second one, etc).

My problem here is that, when I run it in the process model, the first time I add a row, a number "2" appears by defect. If I delete the created row and add new ones, then it works in a correct way. What can be happening with this default value? How can I correct it? 
 1. Error when I first add a row 
 
 2. After deleting the row and adding new ones, it works properly 
 
 About my code: 
 1.Configuration of the first column 
 
 2. Function used to auto-generate the values (inside the append function)

My code is the following one: 
 a!localVariables(
 local!LineasPedido,
 {
 a!sectionLayout(
 label: "L&#237;neas Pedido",
 labelIcon: "list-alt-solid",
 contents: {
 a!gridLayout(
 label: "A continuaci&#243;n, incorpore las l&#237;neas de pedido correspondientes y pulse el bot&#243;n de creaci&#243;n",
 headerCells: {
 a!gridLayoutHeaderCell(label: "Linea Pedido"),
 a!gridLayoutHeaderCell(label: "Pedido"),
 a!gridLayoutHeaderCell(label: "Proveedor"),
 a!gridLayoutHeaderCell(label: "Material"),
 a!gridLayoutHeaderCell(label: "Precio Unitario"),
 a!gridLayoutHeaderCell(label: "Cantidad"),
 a!gridLayoutHeaderCell(label: "Importe Total"),
 a!gridLayoutHeaderCell()
 },
 columnConfigs: {
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "DISTRIBUTE"),
 a!gridLayoutColumnConfig(width: "ICON")
 },
 rows: a!forEach(
 items: local!LineasPedido,
 expression: a!gridRowLayout(
 contents: {
 a!textField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{fcfa4b36-4398-4430-8055-ecfa59daf13a}idLineaPedido'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{fcfa4b36-4398-4430-8055-ecfa59daf13a}idLineaPedido']
 }
 ),
 a!textField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{71427dbb-12db-4f83-bd99-f625bf9af271}idPedido'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{71427dbb-12db-4f83-bd99-f625bf9af271}idPedido']
 }
 ),
 a!textField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{464f0883-d6d5-4c58-b054-4de8e9e99902}Proveedor'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{464f0883-d6d5-4c58-b054-4de8e9e99902}Proveedor']
 }
 ),
 a!textField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{69e9a834-b2fb-4f35-a36d-3c526c97f4ac}Material'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{69e9a834-b2fb-4f35-a36d-3c526c97f4ac}Material']
 }
 ),
 a!floatingPointField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit'],
 a!save(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{beb59a89-a332-46d3-b718-a8285f58f942}Importe'],
 if(
 or(
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad']
 ),
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 )
 ),
 0,
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'] * fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 )
 )
 },
 required: true,
 validations: {
 if(
 a!isNotNullOrEmpty(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 ) = false,
 "",
 if(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit'] < 0,
 "El precio unitario debe ser superior a cero",
 ""
 )
 )
 }
 ),
 a!integerField(
 value: fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'],
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'],
 a!save(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{beb59a89-a332-46d3-b718-a8285f58f942}Importe'],
 if(
 or(
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad']
 ),
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 )
 ),
 0,
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'] * fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 )
 )
 },
 required: true,
 validations: {
 if(
 a!isNotNullOrEmpty(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad']
 ) = false,
 "",
 if(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'] < 1,
 "La cantidad debe ser superior a cero",
 ""
 )
 )
 }
 ),
 a!floatingPointField(
 value: if(
 or(
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad']
 ),
 isnull(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 )
 ),
 0,
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{e78c5b35-026f-4713-8404-05077c6c9152}Cantidad'] * fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{47f4bf32-2e41-4c5a-a7e7-9fc7786bd753}PrecioUnit']
 ),
 saveInto: {
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{beb59a89-a332-46d3-b718-a8285f58f942}Importe']
 },
 required: true,
 validations: {
 if(
 a!isNotNullOrEmpty(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{beb59a89-a332-46d3-b718-a8285f58f942}Importe']
 ) = false,
 "",
 if(
 fv!item['recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{beb59a89-a332-46d3-b718-a8285f58f942}Importe'] < 0,
 "El importe debe ser superior a cero",
 ""
 )
 )
 },
 align: "RIGHT"
 ),
 a!richTextDisplayField(
 value: {
 a!richTextIcon(
 icon: "times-circle",
 link: a!dynamicLink(
 value: remove(local!LineasPedido, fv!index),
 saveInto: local!LineasPedido
 ),
 linkstyle: "STANDALONE",
 color: "NEGATIVE"
 )
 }
 )
 }
 )
 ),
 addrowlink: a!dynamicLink(
 label: "A&#241;adir nueva L&#237;nea de Pedido",
 saveInto: a!save(
 target: local!LineasPedido,
 value: append(
 local!LineasPedido,
 'recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido'(
 'recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{71427dbb-12db-4f83-bd99-f625bf9af271}idPedido': ri!record['recordType!{3c95c0e4-e69d-43f6-b485-e72b24252af7}CPF Maestro Pedidos.fields.{7309402c-2312-4a4e-bdaa-5654789bffb2}idPedido'],
 'recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{464f0883-d6d5-4c58-b054-4de8e9e99902}Proveedor': ri!record['recordType!{3c95c0e4-e69d-43f6-b485-e72b24252af7}CPF Maestro Pedidos.fields.{e11e6206-fc23-4a4b-9819-4db5a5bab685}nomProveedor'],
 'recordType!{495578a9-1b23-4253-8145-6418faabe727}CPF Lineas Pedido.fields.{fcfa4b36-4398-4430-8055-ecfa59daf13a}idLineaPedido': count(local!LineasPedido) + 1
 )
 )
 )
 )
 )
 }
 ),
 a!buttonLayout(
 primaryButtons: {
 a!buttonWidget(
 label: "Completar Creaci&#243;n Pedido",
 saveInto: a!save(
 ri!recordLineasPedido,
 local!LineasPedido
 ),
 submit: true,
 style: "PRIMARY",
 validate: true
 )
 },
 secondaryButtons: {
 a!buttonWidget(
 label: "Cancelar",
 value: true,
 saveInto: ri!cancel2,
 submit: true,
 style: "NORMAL",
 validate: false
 )
 }
 )
 }
) 
 
 Thanks a lot!

Stefan Helzle · Accepted Answer

Sure. That is because now, you put a NULL value into a list and try to count the items in that list. That will again evaluate to "1" in case the local variable is NULL. 
 I repeat my suggestion: "I suggest to i nitialise it using "{}"." 
 You need to do that in line 2 of your code in the initial post.

Problem with auto-generated numbers in an editable grid

Top Replies