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====== Variable Management in TAST ======

{{:TAST-icon.png?nolink&70|}} 

This is the information about how to use and manage the variables in TAST.

===== Validations in Frontend of the data types: =====

The web application should prevent situations like this:

{{:en:uno.png?400|}}


Or situations like this one:


{{:en:dos.jpg?600|}}

{{:en:tres.jpg?600|}}

The validation in Frontend will be done by javascript. It would be a good option to leave the numeric keys only active in the case of integer value.

==== Using more than one data type for the same variable ====

Can another type of data be assigned to the same variable?  Yes, there is no need or impediment to be rigid.

==== Using colors in messages that declare variables ====

In this way, the user could at a simple glance understand that the variable he has used is not the same type of data as the variable he is declaring.

==== Introduction of specific controls associated with variables ====

   *In a setVariable, depending on the type of data selected, show:
   *TastDataBoolean: checkbox.
   *TastDataInteger: text input that allows you to enter only numbers (without a comma, no points) or Integer variables.
   *TastDataString: n.a
   *TastDataDouble: text input that allows to enter only numbers or variables of type Integer or Double.
   *TastDataDate: text input with calendar. It allows to enter variables of type TastDataDate. You must validate the date before saving.
===== Validations in Backend =====

Text.

==== List of Casting allowed / not allowed in TAST ====

^From/To ^String^Boolean^Integer^Double^Date^ Table^ 
|String|Don't Apply|Assigns a Boolean object that represents the true value if the String is not null and is equal, ignoring case, to the "true" string.| Returns Integer if String is a number. If it is a number like 100.00, everything that comes behind the point is deleted. If it is not number it throws exception.|Returns Double if String is a number. If it is not a number, it throws an exception.|Returns Date if String is date. If it is not a date, or does not find the format, it throws an exception.|Returns a table with a column, and a row with the string.If the string is separated by comma, or semicolon, we create as many columns as commas.|
|Boolean|Returns what the getStringValue () function returns;|Don’t Apply|Returns 1 if it is true and 0 if it is false|Returns 1.00 if true, and 0.00 If it is false|Exception. Not allowed.|Returns a table with a column, and a row with the boolean|
|Integer|Returns what the getStringValue () function returns;|Returns true if it is a number greater than 0, and false if it is null or 0|Don’t Apply|Returns the integer with .00|Exception. Not allowed.|Returns a table with a column, and a row with the Integer|
|Double|Returns what the getStringValue () function returns;|Returns true if it is a number greater than 0, and false if it is null or 0|Returns an Integer (e.g. 5.25 -> 5)|Don’t Apply|Exception. Not allowed.|Returns a table with a column, and a row with the Double|
|Date|Returns what the getStringValue () function returns;|Exception. Not allowed.|Exception. Not allowed.|Exception. Not allowed.|Don’t Apply|Returns a table with a column, and a row with the Date|
|Table\\ see the 3-rd chapter “Additional information about Variables in TAST”|Returns what the getStringValue () function returns;|Exception. Not allowed.|Exception. Not allowed.|Exception. Not allowed.|Exception. Not allowed.|Don’t Apply|



===== Additional information about Variables in TAST =====

You should consider this information: In the application there are new data types that are not displayed in the frontend, but internally are being used by TAST. They will be available soon as a part of the new adaptors we are currently building:

   *TastRowTableData.
   *TastIterateTableData.
   *TastTableCell.
   *Variant.
   *Collection.
   *Lists.

In setVariable, there are data types that cannot be entered for the moment:

   *TastRowValues.
   *TastHttpResponse.
   *TastHtmlTable.
   *TastTableDate.
   *Variant.
   *Collection.
   *Lists.

===== Confirmation when you are deleting messages and variables =====

When you delete a message, an another UML item or a variable, is appears a confirmation message before the deletion.

In the case of the variables, TAST asks not only for the variables but also for the references to them.

{{:en:variables00-deletion.png?nolink|}}

{{:en:variables01-deletion.png?nolink|}}
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