How to use the graphql-mapping-template.bool function in graphql-mapping-template
To help you get started, we’ve selected a few graphql-mapping-template examples, based on popular ways it is used in public projects.
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aws-amplify / amplify-cli / packages / graphql-dynamodb-transformer / src / resources.ts View on Github 
set(ref('limit'), ref(`util.defaultIfNull($context.args.limit, ${defaultPageLimit})`)),
DynamoDBMappingTemplate.query({
query: obj({
expression: str('#typename = :typename'),
expressionNames: obj({
'#typename': str('__typename'),
}),
expressionValues: obj({
':typename': obj({
S: str(type),
}),
}),
}),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(equals(ref('context.args.sortDirection'), str('ASC')), bool(true), bool(false)),
bool(true)
),
filter: ifElse(ref('context.args.filter'), ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'), nul()),
limit: ref('limit'),
nextToken: ifElse(ref('context.args.nextToken'), str('$context.args.nextToken'), nul()),
isSyncEnabled,
}),
])
),
ResponseMappingTemplate: isSyncEnabled
? print(
DynamoDBMappingTemplate.dynamoDBResponse(
compoundExpression([iff(raw('!$result'), set(ref('result'), ref('ctx.result'))), raw('$util.toJson($result)')])
)
)
: print(ref('util.toJson($ctx.result)')),set(ref('query'), makeExpression(keySchema, connectionAttributes))
];
if (keySchema[1] && !connectionAttributes[1]) {
let sortKeyType = relatedType.fields.find(f => f.name.value === keySchema[1].AttributeName).type;
let sortKeyAttType = attributeTypeFromScalar(sortKeyType);
setup.push(applyKeyConditionExpression(keySchema[1].AttributeName, sortKeyAttType, 'query'));
}
var queryArguments : { query, filter, scanIndexForward, limit, nextToken, index? } = {
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
)
}
if (indexName) {if (keySchema[1] && !connectionAttributes[1]) {
let sortKeyType = relatedType.fields.find(f => f.name.value === keySchema[1].AttributeName).type;
let sortKeyAttType = attributeTypeFromScalar(sortKeyType);
setup.push(applyKeyConditionExpression(keySchema[1].AttributeName, sortKeyAttType, 'query'));
}
var queryArguments : { query, filter, scanIndexForward, limit, nextToken, index? } = {
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
)
}
if (indexName) {
let indexArg = "index";
queryArguments[indexArg] = str(indexName);'query',
this.makeCompositeSortKeyName(String(keySchema[1].AttributeName)),
String(keySchema[1].AttributeName)));
}
}
let queryArguments = {
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
),
index: indexName ? str(indexName) : undefined
}
if (!indexName) {}
return new Resolver({
ApiId: Fn.GetAtt(ResourceConstants.RESOURCES.GraphQLAPILogicalID, 'ApiId'),
DataSourceName: Fn.GetAtt(ModelResourceIDs.ModelTableDataSourceID(relatedType), 'Name'),
FieldName: field,
TypeName: type,
RequestMappingTemplate: print(
compoundExpression([
...setup,
DynamoDBMappingTemplate.query({
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
),
index: str(`gsi-${connectionName}`)),
iff(ref('context.args.nextToken'), set(ref(`${requestVariable}.nextToken`), str('$context.args.nextToken'))),
iff(
ref('context.args.filter'),
set(ref(`${requestVariable}.filter`), ref('util.parseJson("$util.transform.toDynamoDBFilterExpression($ctx.args.filter)")'))
),
ifElse(
raw(`!$util.isNull($${ResourceConstants.SNIPPETS.ModelQueryExpression})
&& !$util.isNullOrEmpty($${ResourceConstants.SNIPPETS.ModelQueryExpression}.expression)`),
compoundExpression([
qref(`$${requestVariable}.put("operation", "Query")`),
qref(`$${requestVariable}.put("query", $${ResourceConstants.SNIPPETS.ModelQueryExpression})`),
ifElse(
raw(`!$util.isNull($ctx.args.sortDirection) && $ctx.args.sortDirection == "DESC"`),
set(ref(`${requestVariable}.scanIndexForward`), bool(false)),
set(ref(`${requestVariable}.scanIndexForward`), bool(true))
),
]),
qref(`$${requestVariable}.put("operation", "Scan")`)
),
raw(`$util.toJson($${requestVariable})`),
])
),
ResponseMappingTemplate: isSyncEnabled ? print(DynamoDBMappingTemplate.dynamoDBResponse()) : print(ref('util.toJson($ctx.result)')),
});
}DataSourceName: Fn.GetAtt(ModelResourceIDs.ModelTableDataSourceID(relatedType), 'Name'),
FieldName: field,
TypeName: type,
RequestMappingTemplate: print(
compoundExpression([
...setup,
DynamoDBMappingTemplate.query({
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
),
index: str(`gsi-${connectionName}`)
})
])
),} else {
setup.push(applyCompositeKeyConditionExpression(this.getSortKeyNames(String(keySchema[1].AttributeName)),
'query',
this.makeCompositeSortKeyName(String(keySchema[1].AttributeName)),
String(keySchema[1].AttributeName)));
}
}
let queryArguments = {
query: raw('$util.toJson($query)'),
scanIndexForward: ifElse(
ref('context.args.sortDirection'),
ifElse(
equals(ref('context.args.sortDirection'), str('ASC')),
bool(true),
bool(false)
),
bool(true)
),
filter: ifElse(
ref('context.args.filter'),
ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'),
nul()
),
limit: ref('limit'),
nextToken: ifElse(
ref('context.args.nextToken'),
str('$context.args.nextToken'),
nul()
),
index: indexName ? str(indexName) : undefined
}TypeName: 'Query',
RequestMappingTemplate: graphql_mapping_template_1.print(graphql_mapping_template_1.compoundExpression([
graphql_mapping_template_1.set(graphql_mapping_template_1.ref('limit'), graphql_mapping_template_1.ref("util.defaultIfNull($context.args.limit, " + defaultPageLimit + ")")),
graphql_mapping_template_1.DynamoDBMappingTemplate.query({
query: graphql_mapping_template_1.obj({
'expression': graphql_mapping_template_1.str('#typename = :typename'),
'expressionNames': graphql_mapping_template_1.obj({
'#typename': graphql_mapping_template_1.str('__typename')
}),
'expressionValues': graphql_mapping_template_1.obj({
':typename': graphql_mapping_template_1.obj({
'S': graphql_mapping_template_1.str(type)
})
})
}),
scanIndexForward: graphql_mapping_template_1.ifElse(graphql_mapping_template_1.ref('context.args.sortDirection'), graphql_mapping_template_1.ifElse(graphql_mapping_template_1.equals(graphql_mapping_template_1.ref('context.args.sortDirection'), graphql_mapping_template_1.str('ASC')), graphql_mapping_template_1.bool(true), graphql_mapping_template_1.bool(false)), graphql_mapping_template_1.bool(true)),
filter: graphql_mapping_template_1.ifElse(graphql_mapping_template_1.ref('context.args.filter'), graphql_mapping_template_1.ref('util.transform.toDynamoDBFilterExpression($ctx.args.filter)'), graphql_mapping_template_1.nul()),
limit: graphql_mapping_template_1.ref('limit'),
nextToken: graphql_mapping_template_1.ifElse(graphql_mapping_template_1.ref('context.args.nextToken'), graphql_mapping_template_1.str('$context.args.nextToken'), graphql_mapping_template_1.nul())
})
])),
ResponseMappingTemplate: graphql_mapping_template_1.print(graphql_mapping_template_1.compoundExpression([
graphql_mapping_template_1.iff(graphql_mapping_template_1.raw('!$result'), graphql_mapping_template_1.set(graphql_mapping_template_1.ref('result'), graphql_mapping_template_1.ref('ctx.result'))),
graphql_mapping_template_1.raw('$util.toJson($result)')
]))
}).dependsOn(graphql_transformer_common_1.ResourceConstants.RESOURCES.GraphQLSchemaLogicalID);
};
/**graphql-mapping-template
An AST wrapper around AWS AppSync resolvers
Package Health Score
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