### Access Function Help Page

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Use the `?` operator to access the help documentation for specific functions within the redcapAPI package. This is a good starting point for understanding function usage.

```r
?exportRecordsTyped
```

```r
?fieldValidationAndCasting
```

--------------------------------

### Get REDCap API Package Version

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Retrieve the installed version of the redcapAPI package. This information is often required when reporting issues.

```r
packageVersion('redcapAPI')
```

--------------------------------

### Get Project Missing Data Codes

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Retrieve the project's configuration for missing data codes. This is relevant for understanding how missing values are represented.

```r
rcon$projectInformation()$missing_data_codes
```

--------------------------------

### Configure keyring for REDCap API Access

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Set the keyring backend to file-based storage and unlock your REDCap connection using API keys. Ensure your REDCap URL and project name are correctly specified.

```R
options(keyring_backend=keyring::backend_file)

unlockREDCap(c(rcon    = '<MY PROJECT NAME>'),
             keyring     = 'API_KEYs',
             envir       = globalenv(),
             url         = 'https://<REDCAP_URL>/api/')
exportBulkRecords(list(db = rcon),
  forms = list(db = unique(rcon$metadata()$form_name)),
  envir = globalenv())
```

--------------------------------

### Load redcapAPI Package

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Loads the redcapAPI package into the R session. This is a prerequisite for using any of its functions.

```r
library(redcapAPI)

```

--------------------------------

### Export Records with Typed Casting

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Use this function to export records from REDCap. It attempts to cast data into appropriate R types. Check for warnings related to data validation failures.

```r
Rec <- exportRecordsTyped(rcon)
```

--------------------------------

### Export Records with Empty Row Filtering Disabled

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

When exporting records, try setting `filter_empty_rows=FALSE` to see if this resolves issues related to empty rows in the export.

```r
filter_empty_rows=FALSE
```

--------------------------------

### Export Raw Records Skipping Validation

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Perform a raw data export without any validation or casting by the library. This is useful for diagnosing issues with the library's processing.

```r
exportRecordsTyped(rcon, validation = skip_validation, cast = raw_cast)
```

--------------------------------

### Review Invalid Records

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

If `exportRecordsTyped` returns warnings about invalid data, use this function to inspect the problematic records.

```r
reviewInvalidRecords(Rec)
```

--------------------------------

### Check for Secondary Unique Field

Source: https://github.com/nutterb/redcapapi/blob/main/README.md

Check if a secondary unique field is defined in the REDCap project. The absence of this field can cause issues with data exports, especially in older REDCap versions.

```r
rcon$projectInformation()$secondary_unique_field
```

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