Iterating Over Message Segments

Mirth® Connect by NextGen Healthcare User Guide

Iterator Transformer Step

This is a special type of step that allows you to perform extract / transform operations while iterating through an array or list of XML nodes. For additional information, see Working With Iterators . Item Name Description Iterate On The element to iterate on. This may be a list of E4X XML nodes, or a Java / JavaScript array. Index Variable The index variable to use for each iteration. Drag-and-Drop Substitutions When drag-and-dropping values into the children underneath this Iterator, the index variable (e.g. "[i]") will be injected after any of these prefixes. For example if your index variable is i and you have msg['PID'] in the Drag-and-Drop Substitutions table, when you drag the value msg['PID']['PID.3']['PID.3.1'].toString() from the Message Trees Tab into a child step, it will automatically be replaced with msg['PID'][i]['PID.3']['PID.3.1'].toString(). Parent topic: Transformer Step Properties

Mirth® Connect by NextGen Healthcare User Guide

Create a Message Builder Step

When editing a transformer, you can create a Message Builder Transformer Step directly from the message tree. Method 1: Right-click the node you want to modify, then select Map to Message. A dialog may be shown asking whether you want to add the step as part of an Iterator. For additional information, see Working With Iterators. A Message Builder is automatically added to the table with the selected node populated appropriately. Method 2 Drag the node you wish to map from the inbound message tree, and drop it into the node you wish to map to in the outbound message tree. The same steps follow as in Method 1. Parent topic: Message Trees Tab

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Rule/Step Table

The table in the top half of the Edit Filter / Transformer Views shows all the rules/steps you currently have configured. If you have Iterators, the elements are organized into a tree-table with the children underneath each Iterator. Column Description Enabled Determines whether the rule/step is currently enabled. When disabled, rules/steps are not executed at all, and act as if they were never there in the first place. For filters, this could change behavior as it follows the AND/OR order of operations. When all rules in a filter are disabled, the filter acts as if no rules exist, and is not executed at all. # This is the sequence number of the rule / step, starting at 0 for the first one. For child elements underneath an Iterator, this will be multiple numbers separated by a dash, to indicate the child index of each depth level. Name This is the name of the rule / step. If the type of rule / step allows user editing, you can double-click the cell to edit the name. For filter rules, y

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Iterating Over Repeating Fields

To iterate over repeating fields, check the Handle Repetitions property. First, use the XML object’s length() method to get the number of repetitions to iterate over: var reps = msg ['PV1]['PV1.7'].length(); Then, use a for each loop to iterate over repetitions: for each (attendingDr in msg['PV1']['PV1.7']) { lastName = attendingDr['PV1.7.2'].toString();} Note that although JavaScript can be used to iterate through repeating fields, you may find it easier to use the Iterator Rule / Step instead. Parent topic: Using JavaScript in Mirth Connect

Mirth® Connect by NextGen Healthcare User Guide

Filter Tasks

The following context-specific tasks are available throughout the Edit Filter View: Task Icon Task Name Description Add New Rule Adds a new filter rule to the table. If an Iterator rule or any rule that is a child of an Iterator is currently selected, the new rule is placed at the end of the children of the most immediate parent Iterator. Otherwise, the new rule is placed at the very end of the list at the bottom of the table. Delete Rule Removes the currently selected rule from the table. If an Iterator rule is deleted, all of its children are also deleted. Assign To Iterator Adds the selected rule to a new or existing Iterator. For additional information, see Working With Iterators. Remove From Iterator Removes the selected rule from its current Iterator. For additional information, see Working With Iterators. Import Filter Imports a filter from an XML file. You can choose to completely replace the current filter or simply append the rules to the current table. For additional informa

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Create a Rule Builder Rule or Mapper Step

When editing a filter, you can create a Rule Builder Filter Rule directly from the message tree. When editing a transformer, you can create a Mapper Transformer Step in the same way. Method 1 Right-click the node you wish to filter on or map, then select either Filter by Value or Map to Variable: A dialog may be shown asking whether you want to add the rule/step as part of an Iterator. For additional information, see Working With Iterators A Rule Builder or Mapper is automatically added to the table with the selected node populated appropriately. Method 2 Drag the node you wish to filter on or map from the tree into the table. The same steps follow as in Method 1. Parent topic: Message Trees Tab

Iterating Over Message Segments

Recommendations

Iterator Transformer Step

Create a Message Builder Step

Rule/Step Table

Iterating Over Repeating Fields

Filter Tasks

Create a Rule Builder Rule or Mapper Step

Iterating Over Message Segments

Iterator Transformer Step

Create a Message Builder Step

Rule/Step Table

Iterating Over Repeating Fields

Filter Tasks

Create a Rule Builder Rule or Mapper Step